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HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 401
Multiple Choice Questions
Chemistry: Chapter 44 Introduction to selected homologous series
Sections 44.144.2
1
Which of the following are characteristics of compounds in the same homologous
series?
(1) They have the same physical properties.
(2) They have similar chemical properties.
(3) They have the same general formula.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
2
Which of the following statements concerning organic compounds are correct?
(1) Organic compounds are compounds of carbon.
(2) Organic compounds can be represented by condensed formulae.
(3) Each organic compound has its own unique IUPAC name.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
3
Which of the following statements concerning the members of a homologous series
are correct?
(1) Each of them differs from the next one by a CH2 group.
(2) They have the same functional group.
(3) They have the same chemical properties.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 44.3
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 402
4
Which of the following are common properties of alcohols and carboxylic acids?
(1) Both of them have relatively higher boiling points than alkanes with a similar
relative molecular mass.
(2) Both of them can form intermolecular hydrogen bonds.
(3) Lower members of both series are miscible with water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
5
Which of the following statements concerning pent-1-ene and hex-2-ene are correct?
(1) They can decolorize bromine water in the dark.
(2) They are insoluble in water.
(3) They belong to the same homologous series because they have the same
empirical formula.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
6
Which of the following compounds belong to the same homologous series?
(1) 1-chloropropene
(2) 1-chloropropane
(3) 2-chlorobutane
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
7
The strength of intermolecular forces of alkanes depends on
(1) the molecular mass.
(2) the molecular size.
(3) the presence of multiple bonds.
A. (1) and (2) only
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 403
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
8
Which of the following is the IUPAC name for CH3CH(CH3)CH3?
A. Butane
B. 2-methylbutane
C. 1-methylpropane
D. 2-methylpropane
9
Which of the following statements concerning pentane and 2,2-dimethylpropane are
correct?
(1) They have the same molecular formula.
(2) Pentane is a straight-chain alkane while 2,2-dimethylpropane is a branched-chain
alkane.
(3) The dispersion forces among pentane molecules are weaker than those among
2,2-dimethylpropane molecules.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 44.4
10
Which of the following organic compounds does NOT have the molecular formula of
C3H6O2?
A. Propanoic acid
B. Methyl ethanoate
C. Ethyl ethanoate
D. Ethyl methanoate
11
Which of the following organic molecules are held together by hydrogen bonds as
well as van der Waals’ forces?
(1) Butan-2-ol
(2) Propanamide
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 404
(3) Pentanal
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
12
Which of the following is the correct order of decreasing boiling points of the organic
compounds?
A. Propanoic acid > Methyl ethanoate > Propan-1-ol
B. Propan-1-ol > Methyl ethanoate > Propanoic acid
C. Propanoic acid > Propan-1-ol > Methyl ethanoate
D. Methyl ethanoate > Propanoic acid > Propan-1-ol
13
What is the IUPAC name for the organic compound with the condensed formula of
CHBr2CHFCHClCH3?
A. 4,4-dibromo-2-chloro-3-fluorobutane
B. 1,1-dibromo-2-fluoro-3-chlorobutane
C. 1,1-dibromo-2-fluoro-3-chloro-3-methylpropane
D. 1,1-dibromo-3-chloro-2-fluorobutane
14
Which of the following is the correct order of decreasing boiling points of the organic
compounds?
A. Ethanamide > Propanoic acid > Methyl ethanoate
B. Propanoic acid > Ethanamide > Methyl ethanoate
C. Propanoic acid > Methyl ethanoate > Ethanamide
D. Methyl ethanoate > Propanoic acid > Ethanamide
15
Pyrethrum flowers contain a natural insecticide called pyrethrin. Pyrethrin has the
following structure:
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 405
Which of the following functional groups are present in pyrethrin?
(1) Carbon-carbon double bond
(2) Ester group
(3) Ketone group
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
16
Which of the following is the correct order of decreasing boiling points of the organic
compounds?
A. Ethanoic acid > ethanol > ethanamide > chloroethane
B. Chloroethane > ethanoic acid > ethanamide >ethanol
C. Ethanol > chloroethane > ethanoic acid > ethanamide
D. Ethanamide > ethanoic acid > ethanol > chloroethane
17
Which of the following statements concerning unsubstituted amides and primary
amines are INCORRECT?
(1) Both of them are acid derivatives.
(2) Both of them have higher boiling points than carboxylic acids with a similar
relative molecular mass.
(3) Each ethanamide molecule can form a maximum of four hydrogen bonds with
water molecules while each ethanamine molecule can form a maximum of three
hydrogen bonds with water molecules.
A. (1) and (2) only
B. (1) and (3) only
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 406
C. (2) and (3) only
D. (1), (2) and (3)
18
Which of the following sets of compounds is in the same homologous series?
A. C2H4, C3H6, C4H10
B. CH3OH, CH3OCH3, CH3CH2CH2OH
C. CH3Cl, C3H7Cl, C5H11Cl
D. CH3COOH, CH3COOCH3, CH3CH2COCH2OH
19
Which of the following compounds are miscible with water?
(1) Propan-1-ol
(2) Chloromethane
(3) Propanoic acid
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
20
Which of the following compounds is insoluble in water?
A. CH3CH2CH2OH
B. CH3CCl3
C. CH3COCH3
D. CH3CH2CHO
21
Which of the following statements concerning the compounds in the same
homologous series are correct?
(1) Their boiling points increase with the length of hydrocarbon chains.
(2) Their solubilities in water decrease with the length of hydrocarbon chains.
(3) They have similar chemical properties.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 407
22
Which of the following homologous series does NOT have hydrogen bonds between
their molecules?
A. Ketones
B. Alcohols
C. Primary amines
D. Carboxylic acids
23
Which of the following homologous series does NOT form hydrogen bonds with
water molecules?
A. Aldehydes
B. Ketones
C. Esters
D. Alkanes
24
Which of the following compounds has the highest boiling point?
A. Propene
B. Propanone
C. Propan-1-ol
D. Propanoic acid
25
Which of the following compounds are soluble in water?
(1) Propan-2-ol
(2) Butanoic acid
(3) 2-fluoropropane
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
26
Which of the following statements concerning esters are correct?
(1) The general formula of esters is RCOOR’.
(2) There are hydrogen bonds among the ester molecules.
(3) Lower members of esters are soluble in water.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 408
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
27
Which of the following statements concerning 2-methylpropanamide are correct?
(1) It is a substituted amide.
(2) It is slightly denser than water.
(3) It is soluble in water because its molecules can form hydrogen bonds with water
molecules.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
28
Which of the following are the common properties of alkanes and alkenes?
(1) Both are insoluble in water.
(2) Both are less dense than water.
(3) Both have higher boiling points but lower melting points than other organic
compounds with similar relative molecular masses.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
29
What is the condensed formula of the following compound?
A. CHBrCHC≡CCOOH
B. CHBr=CHC≡CCOOH
C. CHBrCHCCCOOH
D. CHBr=CHC≡CC=OOH
30
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 409
Arrange the following compounds in order of increasing boiling point.
Butanol, Butanone, Butanoic acid
A. Butanol Butanone Butanoic acid
B. Butanone Butanol Butanoic acid
C. Butanoic acid Butanone Butanol
D. Butanoic acid Butanol Butanone
31
Which of the following statements concerning unsubstituted amides are correct?
(1) The general formula of amides is RCONH2, where R is a hydrogen atom or an
alkyl group.
(2) The boiling points of amides are higher than that of carboxylic acids because
amides have more extensive hydrogen bonds than carboxylic acids.
(3) Each amide molecule can form a maximum of four hydrogen bonds with the
other amide molecules.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
32
Which of the following combinations is correct?
Homologous series General formula
A. Aldehydes RCOR’
B. Primary amines RNH2
C. Ketones RCHO
D. Substituted amides RCONH2
33
Which of the following compounds are soluble in water?
(1) Propyl methanoate
(2) Butan-1-amine
(3) Butanone
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 410
34
Which of the following is the condensed formula for 4-bromopent-2-ene?
A. CH3CH=CHCHBrCH3
B. CH3CHCHCHBrCH3
C. CH3CBrCHCH2CH3
D. CH3CBr=CHCH2CH3
35
What is the IUPAC name for CH3(CH2)2CHO?
A. Butan-1-ol
B. Butanal
C. 3-methylpropan-1-ol
D. 3-methylpropanal
36
What is the IUPAC name for CH2ClCH2Br?
A. 1-chloro-2-bromoethane
B. 2-chloro-1-bromoethane
C. 1-bromo-2-chloroethane
D. 2-bromo-1-chloroethane
37
Which of the following compounds have hydrogen bonds as well as van der Waals’
forces among their molecules?
(1) Methyl propanoate
(2) 2-methylpropanamide
(3) 2,3-dichloropropan-1-ol
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
38
Which of the following is the IUPAC name for CH3C(OH)2CH3?
A. 2,2-hydroxypropane
B. 2,2-dihydroxypropane
C. Propan-2,2-ol
D. Propane-2,2-diol
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 411
39
Which of the following is the condensed formula for propan-2-ol?
A. CH3CHOHCH3
B. CH3CH2OHCH3
C. CH2OHCH2CH3
D. CH3OHCH2CH3
40
Which of the following statements concerning unsubstituted amides are correct?
(1) 2-methylpropanamide is an unsubstituted amide.
(2) The general formula for unsubstituted amides is RNH2, where R is an alkyl
group.
(3) There are hydrogen bonds as well as van der Waals’ forces among the
unsubstituted amides molecules.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
41
What is the IUPAC name for the following compound?
A. 2-methylbutanone
B. 3-methylbutanone
C. 3-methyl-2-oxobutane
D. 2-methyl-3-oxobutane
42
Which of the following is the IUPAC name for CH3CH(CH3)COOH?
A. Butanoic acid
B. Propanoic acid
C. 2-methylbutanoic acid
D. 2-methylpropanoic acid
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 412
43
Which of the following is the condensed formula for ethyl ethanoate?
A. CH3COOC2H5
B. CH3CH2COOC2H5
C. CH3COOCH3
D. CH3CH2COOCH3
44
Which of the following is the structural formula for methyl methanoate?
A.
B.
C.
D.
45
Which of the following is the IUPAC name for CH3CH2CONH2?
A. 1-aminopropanone
B. 1-amino-1-oxopropane
C. 1-oxo-1-aminopropane
D. Propanamide
46
Which of the following statements concerning primary amines are correct?
(1) Primary amines are those with only one hydrogen atom attached to the nitrogen
atom replaced by an alkyl group.
(2) Pentan-3-amine is a primary amine.
(3) Each amine group can form a maximum of three hydrogen bonds with water
molecules.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
47
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 413
Which of the following statements concerning methanoic acid and propane are
correct?
(1) They have similar relative molecular masses.
(2) Methanoic acid has a higher boiling point than propane.
(3) The molecules of methanoic acid are held together by hydrogen bonds as well as
van der Waals’ forces while the molecules of propane are held together by
dispersion forces only.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
48
Which of the following compounds can form more than one hydrogen bond with
water molecules?
(1) Propanone
(2) Propanamide
(3) Propan-1-amine
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 44.5
49
What is the IUPAC name of the following compound?
A. 2-hydroxypropanoic acid
B. 2-methyl-2-hydroxyethanoic acid
C. Propanoic acid
D. 2-carboxyethanol
50
What is the IUPAC name of the following compound?
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 414
A. 6-methylhept-5-ene-4-one
B. 1,1-dimethyl-3-oxohex-1-ene
C. 2-methyl-4-oxohept-2-ene
D. 2-methylhept-2-ene-4-one
51
Consider the following compound:
Which of the following functional groups does it contain?
(1) Carboxyl group
(2) Carbonyl group
(3) Amide group
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
52
What is the IUPAC name for the organic compound with the condensed formula of
HCOCHBrCOCH3?
A. 3-bromo-4-formylbutan-2-one
B. 4-formyl-3-bromobutan-2-one
C. 2-bromo-3-oxobutanal
D. 3-oxo-2-bromobutanal
53
What is the IUPAC name of the following compound?
A. 5-chloro-2-hydroxy-4-oxohepta-2,5-dienoic acid
B. 2-hydroxy-4-oxo-5-chlorohepta-2,5-dienoic acid
C. 3-chloro-6-hydroxy-4-oxohepta-2,5-dienoic acid
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 415
D. 3-chloro-4-oxo-6-hydroxyhepta-2,5-dienoic acid
54
What is the IUPAC name of the following compound?
A. 1,1,1-triiodo-3,3-dimethylpentanal
B. 1,1,1-triiodo-3,3-dimethylpentan-5-al
C. 5,5,5-triiodo-3,3-dimethylpentanal
D. 5,5,5-triiodo-3,3-dimethylpentan-1-al
55
What is the IUPAC name of the following compound?
A. 2-chloro-1-hydroxybut-2-ene
B. 3-chloro-4-hydroxybut-2-ene
C. 2-chlorobut-2-en-1-ol
D. 3-chlorobut-2-en-4-ol
56
Consider the following organic compound:
Which of the following statements concerning the compound above are correct?
(1) It has two functional groups namely amide group and carboxyl group.
(2) It is soluble in water.
(3) Its IUPAC name is aminoethanoic acid.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 416
57
What is the IUPAC name for the following compound?
A. 2-chloro-3-amino-4-formylbutanoic acid
B. 3-amino-2-chloro-4-formylbutanoic acid
C. 2-amino-3-carboxy-3-chloropropanal
D. 2-amino-3-chloro-3-carboxypropanal
58
What is the IUPAC name of the following compound?
A. 1-chloropropan-3-al
B. Chloropropanal
C. 3-chloropropan-1-al
D. 3-chloropropanal
59
What is the IUPAC name for the following compound?
A. 3-hydroxy-4-aminopentanamide
B. 4-amino-3-hydroxypentanamide
C. 4-amino-3-hydroxy-4-methylbutanamide
D. 3-hydroxy-4-amino-4-methylbutanamide
60
What is the IUPAC name of the following compound?
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 417
A. 3-chlorobutyl butanoate
B. 2-chlorobutyl butanoate
C. Butyl 2-chlorobutanoate
D. Propyl 4-chloropentanoate
61
What is the IUPAC name of the following compound?
A. 2,3-diamino-3-bromo-3-hydroxypentanoic acid
B. 3,4-diamino-2-bromo-2-hydroxypentanoic acid
C. 2-bromo-2-hydroxy-3,4-diaminopentanoic acid
D. 2-bromo-2-hydroxy-3,4-diamino-4-methylbutanoic acid
62
Which of the following statements is/are correct?
(1) Two organic compounds with the same general formula must belong to the same
homologous series.
(2) Two organic compounds with one of the functional groups the same must belong
to the same homologous series.
(3) Two organic compounds with the molecular mass differing by 14 must belong to
the same homologous series.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
63
Which of the following combinations about the structural formula for a compound is
correct?
Compound Structural formula
A. Diol B. Methyl 2-oxopent-3-enoate
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 418
C. 5-formylpent-2-ol
D. 3-carboxy-3-chlorobutan-2-ol
64
What is the IUPAC name of the following compound?
A. 3-amino-4-carboxybutan-2-one
B. 3-amino-4-carboxybutan-2-al
C. 2-amino-3-oxobutanoic acid
D. 2-amino-3-methyl-3-oxopropanoic acid
65
Which of the following is the structural formula of
4,5-dichloro-5-fluoro-3-oxopentanoic acid?
Structural formula
A.
B.
C.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 419
D.
66
Which of the following is the condensed formula for 3-oxopentanal?
A. CH3CH2COCH2COH
B. CH3CH2COCH2CHO
C. CH3CH2CH2COCHO
D. CH3CH2CH2COCOH
67
What is the IUPAC name for the following compound?
A. 3-fluoro-3-hydroxy-4,4-diaminopentanoic acid
B. 4,4-diamino-3-fluoro-3-hydroxypentanoic acid
C. 3-fluoro-3-hydroxy-4,4-diamino-4-methylbutanoic acid
C. 4,4-diamino-3-fluoro-3-hydroxy-4-methylbutanoic acid
68
Consider the following compound:
Which of the following homologous series does the above compound belong to?
A. Amines
B. Alcohols
C. Ketones
D. Carboxylic acids
69
Which of the following is the condensed formula for 4-aminobutanamide?
A. NH2CH2(CH2)2CONH2
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 420
B. NO2CH2(CH2)2CONH2
C. NH2CO(CH2)2CONH2
D. CH3(CH2)2CH(NH2)2
Section 44.6
70
What is the condensed formula of chloroform?
A. CCl4
B. CH2Cl2
C. CH3CH2Cl
D. CHCl3
71
Which of the following combinations is correct?
IUPAC name Trivial name Common use
A. Propan-1-ol Isopropyl alcohol Solvent
B. Ethanoic acid Acetic acid Solvent
C. Methanal Formaldehyde Production of polymers
D. Trichloromethane Chloroform Fuel additive
72
What is the trivial name for CHCl3?
A. Acetic acid
B. Acetone
C. Chloroform
D. Formaldehyde
Each question below consists of two separate statements. Decide whether each of
the two statements is true or false; if both are true, then decide whether or not
the second statement is a correct explanation of the first statement. Then select
one option from A to D according to the following table:
A. Both statements are true and the 2nd statement is a correct explanation
of the 1st statement.
B. Both statements are true and the 2nd statement is NOT a correct
explanation of the 1st statement.
C. The 1st statement is false but the 2nd statement is true.
D. Both statements are false.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 421
Sections 44.144.3
73
Alcohols have higher boiling points
and melting points than alkanes with a
similar relative molecular mass.
Hydrogen bonds give a stronger
intermolecular attraction than van der
Waals’ forces.
Section 44.4
74
Most haloalkane molecules are soluble
in water.
Haloalkane molecules are polar.
75
The boiling points of carboxylic acids
are lower than those of alcohols with a
similar relative molecular mass.
Alcohols have more extensive
intermolecular hydrogen bonds than
carboxylic acids.
76
Most haloalkanes have higher melting
points and boiling points than alkanes
with a similar relative molecular mass.
Most haloalkanes have permanent
dipoles.
Sections 44.544.6
77
Formaldehyde can dissolve in water to
form a solution called formalin.
The formaldehyde molecules can form
hydrogen bonds with water molecules.
78
Isopropyl alcohol is the key component
in many non-water-based hand
sanitizers.
Isopropyl alcohol can kill bacteria and
other potentially harmful
micro-organisms.
Chemistry: Chapter 45 Isomerism
Section 45.1
79
How many acyclic structural isomers does C5H10 have?
A. 2
B. 3
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 422
C. 4
D. 5
80
Which of the following statements are correct?
(1) A pair of position isomers differs only in the position of the functional group(s).
(2) A pair of structural isomers has the same relative molecular mass.
(3) A pair of functional group isomers belongs to different homologous series.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
81
Which of the following statements about ethanoic acid and methyl methanoate are
correct?
(1) They are functional group isomers with the molecular formula C2H4O2.
(2) They belong to different homologous series.
(3) They have different chemical properties.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
82
Which of the following compounds are structural isomers of C4H8O?
(1) Butanal
(2) 2-methylpropanal
(3) Butanone
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
83
Which of the following statements concerning ethanoic acid and methyl methanoate
are correct?
(1) They have the same relative molecular mass.
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(2) They have different chemical properties.
(3) They are functional group isomers with the molecular formula C2H4O2.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
84
Which of the following compounds are functional group isomers of C4H8O2?
(1) Methyl propanoate
(2) 4-hydroxybutanal
(3) Butane-1,4-diol
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
85
Butanoic acid can be reduced to a primary alcohol. Which of the following
compounds is the position isomer of the primary alcohol?
A. CH3COCH2CH3
B. CH3CH2CH2CH2OH
C. CH3CH2CH2CHO
D. CH3CH2C(OH)HCH3
86
Which of the following statements concerning isomers is/are correct?
(1) They have the same empirical formula.
(2) They have the same general formula.
(3) They have the same structural formula.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
87
Which of the following statements concerning 3,4-dibromopent-1-ene and
3,5-dibromopent-2-ene are correct?
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(1) They have the same molecular formula of C5H8Br2.
(2) They are position isomers.
(3) They have similar chemical properties.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
88
Which of the following statements concerning the isomers of C6H12 are
INCORRECT?
(1) All isomers of C6H12 can decolorize bromine in 1,1,1-trichloromethane in the
dark.
(2) All isomers of C6H12 have the same melting point and boiling point.
(3) All isomers of C6H12 are optically inactive.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
89
How many structural isomers does C4H8 have?
A. 3
B. 4
C. 5
D. 6
90
Which of the following compounds are structural isomers of C5H10?
(1) 2-methylbut-2-ene
(2) 3-methylbut-1-ene
(3) Pent-1-ene
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
91
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How many structural isomers does C3H6Cl2 have?
A. 2
B. 3
C. 4
D. 5
92
Which of the following compounds are the structural isomers of C5H10O?
(1) 2-methylbutanal
(2) Propyl ethanoate
(3) Pentanal
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 45.2
93
Which of the following statements about geometrical isomerism are correct?
(1) A pair of geometrical isomers has different physical properties.
(2) Geometrical isomers occur due to the restricted rotation about the carbon-carbon
double bond.
(3) A pair of geometrical isomers must be optically active.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
94
Which of the following statements about cis-trans isomerism is/are correct?
(1) All alkenes exhibit cis-trans isomerism.
(2) But-2-ene exhibits cis-trans isomerism.
(3) A pair of cis-trans isomers may be optically active.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
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95
How many chiral carbon(s) does 3,6-dibromo-4-methylhept-4-en-2-ol have?
A. 1
B. 2
C. 3
D. 4
96
Which of the following compounds could exhibit geometrical isomerism?
(1) 3,4-dimethylhex-3-ene
(2) 2-methylpent-2-ene
(3) 1,6-dichlorohex-3-ene
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
97
Which of the following compounds could exhibit optical isomerism?
(1) 2-aminopropanal
(2) 2,3-dihydroxybutanedioic acid
(3) 4-hydroxybutanal
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
98
How many chiral carbon atom(s) does 3-amino-4-hydroxypentanoic acid have?
A. 1
B. 2
C. 3
D. 4
99
Which of the following compounds has a pair of enantiomers?
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A.
B. CH3CH(OH)C2H5
C. CH2ClCH2CH2COOH
D.
100
Consider the following compound:
CH3CH=CHCH2CHO
Which of the following statements about this compound are correct?
(1) It is optically inactive.
(2) It contains a C=C double bond and a hydroxyl group.
(3) The cis isomer of this compound is
.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
101
Which of the following compounds has/have a pair of geometrical isomers?
(1) CH3CH=CH2
(2) CH3OCCH=CHCOCH3
(3) CH2BrCH=CHCH2Cl
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
102
Vitamin E, a naturally occurring compound, can act as an antioxidant. Its structure is
shown below:
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Which of the following statements about vitamin E is/are correct?
(1) It has three chiral carbon atoms.
(2) It is soluble in water.
(3) It is optically active.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
103
Which of the following pairs of compounds is/are NOT a pair of stereoisomers?
(1)
and
(2)
and
(3)
and
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
104
Which of the following statements concerning isomers is correct?
A. A pair of isomers must have the same relative molecular mass.
B. Compound containing carbon-carbon double bond(s) must have a pair of
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geometrical isomers.
C. A mixture of a pair of enantiomers does not rotate the plane of polarized
light.
D. Compounds with the same functional group at different positions are called
functional group isomers.
105
Which of the following statements concerning enantiomers is INCORRECT?
A. If a pair of enantiomers is present in the same amount, the mixture is
optically inactive.
B. A pair of enantiomers has the same melting point.
C. There is at least one plane of symmetry in the molecules of enantiomers.
D. A pair of enantiomers has the same molecular formula.
106
Which of the following compounds could exhibit geometrical isomerism?
(1) CHCl=CHBr
(2) (CH3)2C=CH2
(3) CH3CH=CHCH3
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
107
Which of the following compounds is optically active?
A. CH3CH=CHCH3
B. CH2=CHCHBrCH3
C. CH3CH2COCH3
D. CH3CH2CHClCH2CH3
108
Which of the following compounds is NOT a chiral molecule?
A. 3-methylpent-1-ene
B. 2-chlorobutane
C. 2-methylpropanal
D. 1,1,2-trichlorobutane
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109
Compound X is an organic compound with a molecular formula C4H8O. Which of the
following isomerism could compound X exhibit?
(1) Functional group isomerism
(2) Geometrical isomerism
(3) Enantiomerism
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
110
Which of the following compounds is optically active?
A. CH3CH2COCH3
B. CH3CH2CH2CH(CH3)COCH3
C. CH3CH(CH3)COCH3
D. CH3CH2CHO
111
Which of the following statements concerning geometrical isomers is/are correct?
(1) The cis isomer has a higher melting point than the trans isomer.
(2) A pair of geometrical isomers has the same functional group.
(3) Any organic compounds with a carbon-carbon double bond have geometrical
isomers.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
112
Compound X is an organic compound with the condensed formula
HOOCCH(NH2)CH2COOH.
Which of the following statements concerning compound X are correct?
(1) The IUPAC name of compound X is 2-aminobutanedioic acid.
(2) There is a chiral carbon atom in the molecule of compound X.
(3) Compound X is soluble in water.
A. (1) and (2) only
B. (1) and (3) only
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C. (2) and (3) only
D. (1), (2) and (3)
113
Which of the following types of isomerism does 2-bromobut-2-ene exhibit?
A. Enantiomerism
B. Functional group isomerism
C. Geometrical isomerism
D. Position isomerism
114
Which of the following statements concerning geometrical isomers of
2,3-dibromobut-2-ene is/are correct?
(1) They have similar boiling points.
(2) They have the same functional group.
(3) They have identical intermolecular forces.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
115
How many planes of symmetry are there in a dichloromethane molecule?
A. 0
B. 1
C. 2
D. 3
116
Which of the following compounds could exhibit enantiomerism?
(1) 2-chlorobutane
(2) 3-chlorobut-1-ene
(3) 2-methylbutanal
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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117
Which of the following methods can be used to distinguish a pair of enantiomers?
(1) Measuring their optical activities by using a polarimeter.
(2) Comparing the boiling points of enantiomers.
(3) Comparing the densities of enantiomers.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
118
Which of the following statements concerning structural isomerism is/are correct?
(1) Structural isomers are mirror images of one another.
(2) Structural isomers containing the same functional group have similar chemical
properties.
(3) A pair of structural isomers which are present in different amounts can rotate the
plane of polarized light.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
119
What is the IUPAC name of the following compound?
A. Cis-1-chlorohex-1-en-4-yne
B. Cis-6-chlorohex-5-en-2-yne
C. Trans-1-chlorohex-1-en-4-yne
D. Trans-6-chlorohex-5-en-2-yne
120
Which of the following statements is correct?
A. An achiral molecule has a chiral carbon atom.
B. A mixture of a pair of enantiomers present in the same amount does not
rotate the plane of polarized light.
C. Butan-1-ol is a chiral molecule.
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D. A chiral molecule can be superimposed on its own mirror image.
121
Which of the following compounds have chiral carbon atom(s)?
(1) 3-bromopent-1-ene
(2) 1-chloro-2-methylbutane
(3) Butan-2-ol
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
122
Which of the following compounds can exhibit enantiomerism?
(1) 2-chloro-2-methylbutane
(2) 1-chloro-2-methylbutane
(3) 1-chloro-3-methylbut-1-ene
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
123
Which of the following compounds exhibit(s) enantiomerism?
(1) 1,1,2,2-tetrachloroethane
(2) 2-chloro-2-fluorobutane
(3) 5-chloro-3,4-dimethylpentanoic acid
A. (1) only
B. (2) only
C. (1) and (3)
D. (2) and (3)
124
Consider the following compounds:
Which types of isomers are they?
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A. Position isomers
B. Functional group isomers
C. Chain isomers
D. Geometrical isomers
125
Which of the following compounds exhibit(s) optical isomersim?
(1) Trans-5-chloro-5-fluoropent-2-ene
(2) 1,1-dibromo-1,2-dichloroethane
(3) 2-chloro-2-fluorobutane
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
126
Which of the following are the types of structural isomerism?
(1) Geometrical isomerism
(2) Functional group isomerism
(3) Chain isomerism
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
127
Which of the following statements concerning a pair of geometrical isomers are
correct?
(1) They have different boiling points and melting points.
(2) They have the same relative molecular mass.
(3) Their atoms are joined in the same order.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
128
Which of the following compounds could exhibit enantiomerism?
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(1) 3-bromobut-1-ene
(2) 4-bromobut-1-ene
(3) 2-bromobut-2-ene
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
Each question below consists of two separate statements. Decide whether each of
the two statements is true or false; if both are true, then decide whether or not
the second statement is a correct explanation of the first statement. Then select
one option from A to D according to the following table:
A. Both statements are true and the 2nd statement is a correct explanation
of the 1st statement.
B. Both statements are true and the 2nd statement is NOT a correct
explanation of the 1st statement.
C. The 1st statement is false but the 2nd statement is true.
D. Both statements are false.
Section 45.1
129
Cis-2,3-difluorobut-2-ene has a higher
boiling point than
trans-2,3-difluorobut-2-ene.
The molecules of
cis-2,3-difluorobut-2-ene are held
together by dipole-dipole forces while
the molecules of
trans-2,3-difluorobut-2-ene are held
together by dispersion forces only.
130
Chain isomers have similar physical
properties.
Chain isomers have the same functional
group.
131
Pentane has a higher boiling point than
2-methylbutane.
Pentane and 2-methylbutane are chain
isomers.
132
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Position isomers differ only in the types
of functional group present.
Position isomerism is one of the types of
structural isomerism.
133
Isomers have similar chemical
properties.
Isomers are compounds with the same
molecular formula but different
arrangements of atoms in space.
Section 45.2
134
The cis isomer has a higher boiling point
than the corresponding trans isomer.
The intermolecular forces among the
molecules of cis isomer are stronger than
those among the molecules of the
corresponding trans isomer.
135
A mixture of a pair of enantiomers does
not rotate plane-polarized light.
A pair of enantiomers rotates
plane-polarized light to opposite
directions.
136
Trans-1,2-dichloroethene has no net
dipole moment.
Trans-1,2-dichloroethene has the two
polar CCl bonds pointing in the
opposite directions.
Chemistry: Chapter 46 Typical reactions of various functional groups
Sections 46.146.2
137
Which of following compounds is the major product of the reaction between excess
methane and chlorine?
A. Chloromethane
B. Dichloromethane
C. Trichloromethane
D. Tetrachloromethane
138
Which of the following compounds are the products formed from the reaction
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between methane and chlorine in the presence of light?
(1) Chloromethane
(2) Chloroform
(3) Hydrogen chloride
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
139
Which of the following conditions are required for alkanes to undergo substitution
reactions with bromine?
(1) Sunlight
(2) High temperature
(3) High pressure
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
140
Which of the following statements concerning the substitution reaction between
propane and chlorine are correct?
(1) It does not take place in the dark.
(2) It involves breakage of CH bonds and ClCl bonds.
(3) Hydrogen chloride is one of the products of the reaction.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
141
Which of the following statements concerning the substitution reaction between
methane and chlorine are correct?
(1) The product of the reaction is a mixture of chloroalkanes.
(2) The major product is tetrachloromethane if excess chlorine is used.
(3) Free radicals are produced during the reaction.
A. (1) and (2) only
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B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 46.3
142
Which of the following compound is the major product formed in an addition reaction
between hydrogen chloride and propene?
A. 1-chloropropane
B. 2-chloropropane
C. 1,2-dichloropropane
D. 2,2-dichloropropane
143
Which of the following statements are correct?
(1) Iron is used as a metal catalyst for speeding up hydrogenation.
(2) Bromine can be decolorized in darkness by pent-1-ene.
(3) 2-bromopropane is the major product formed in an addition reaction between
hydrogen bromide and propene.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
144
Consider the following reaction:
+ HBr
Which of the following compounds is/are the possible major product(s) formed in the
above reaction?
(1)
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(2)
(3)
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
145
Which of the following combinations about addition reactions is correct?
Addition reaction The major product
A. CH3CH=CH2 + HBr CH3CH2CH2Br
B. (CH3)2C=CH2 + HBr (CH3)3CBr
C. BrCH=CH2 + HBr BrCH2CH2Br
D. (CH3)3CCH=CH2 + HBr (CH3)3CCH2CH2Br
146
Which of the following statements concerning but-1-ene are correct?
(1) It reacts with hydrogen chloride to give 1-chlorobutane as the major product.
(2) It can decolorize acidified potassium permanganate solution.
(3) It undergoes hydrogenation in the presence of platinum as metal catalyst with
heating.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
147
Which of the following compounds is the major product formed from the reaction
between 2,5-dimethylhex-2,4-diene and hydrogen bromide?
A. 3,5-dibromo-2,5-dimethylhexane
B. 2,4-dibromo-2,5-dimethylhexane
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C. 3,4-dibromo-2,5-dimethylhexane
D. 2,5-dibromo-2,5-dimethylhexane
148
Which of the following statements concerning halogenation and hydrohalogenation
is/are correct?
(1) Both of them follow Markovnikov’s rule.
(2) Both of them involve unsaturated hydrocarbons.
(3) Both of them are substitution reactions.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
149
Which of the following can be classified as addition reactions?
(1) Reaction between ethene and hydrogen
(2) Reaction between ethene and hydrogen chloride
(3) Reaction between methane and chlorine
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
150
Which of the following statements concerning propene are correct?
(1) It reacts with hydrogen in the presence of platinum and heating to give propane.
(2) It reacts with hydrogen chloride to give 1-chloropropane as the major product.
(3) It decolorizes bromine solution in the dark.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
151
Which of the following statements about propene is correct?
A. It can decolorize acidified potassium dichromate solution.
B. It can be prepared by heating propan-1-ol with dilute sulphuric acid.
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C. It reacts with hydrogen in the presence of nickel to give propane.
D. It reacts with hydrogen chloride to give 1-chloropropane as the major
product.
152
Which of the following compounds is the major product for the reaction between
2-methylpropene and hydrogen chloride?
A. 1-chloro-2-methylpropane
B. 1,2-dichloro-2-methylpropane
C. 2-chloro-2-methylpropane
D. 2-methylpropane
153
Which of the following statements about hydrogenation of alkenes is INCORRECT?
A. It requires metal catalysts such as platinum and nickel.
B. It requires heating.
C. It is an endothermic reaction because energy is required to break the C=C
bonds.
D. It involves formation of CH bonds.
154
Which of the following compounds is/are the product(s) formed from the reaction
between pent-1,4-diene and excess bromine in water?
(1) 1,2-dibromopentane
(2) 1,2,4,5-tetrabromopentane
(3) 4,5-dibromopentane
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
155
Which of the following compounds is the major product formed from the reaction
between but-1,3-diene and hydrogen iodide?
A. 1,4-diiodobutane
B 2,4-diiodobutane
C. 1,3-diiodobutane
D. 2,3-diiodobutane
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156
Which of the following reactions are addition reactions?
(1) CH2=CHCH=CH2 + HI
(2) CH3CH2CH2CH3 + Cl2
(3) CH2=CHCH2CH3 + H2
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 46.4
157
Which of the following statements concerning the substitution reaction between
bromoethane and hydroxide ions are correct?
(1) Ethanol is one of the products.
(2) An organic solvent is required for the reaction.
(3) The reaction involves the breakage of the CBr bond.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
158
Which of the following compounds could undergo substitution reactions?
(1) CH3CH=CHCH3
(2) CH3CH2CH2CH3
(3) CH3CH2CH2CH2Br
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
159
Which of the following reactions are substitution reactions?
(1) CH3CH2CH2CH2I + OH
(2) CH3CH2CH2CH3 + Cl2
(3) CH3CH=CHCH3 + H2
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A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
160
Which of the following statements about the reaction between 2-iodobutane and
NaOH(aq) are correct?
(1) The products of the reaction are butan-2-ol and sodium iodide.
(2) The reaction will be faster if 2-chlorobutane replaces 2-iodobutane.
(3) The reaction involves the breakage of the CI bond.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
161
Sodium hydroxide solution was added to a sample of chloromethane in a test tube.
Then, a small amount of acidified silver nitrate solution was added to the reaction
mixture. What could be observed?
A. Gas bubbles were formed.
B. The solution turned silvery.
C. White precipitate was formed.
D. No observable change.
Section 46.5
162
Which of the following reagents are used to convert propan-2-ol to 2-bromopropane?
(1) H2SO4(l) + KBr(s)
(2) Br2(l) + CCl4(l)
(3) PBr3(l)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
163
Which of the following statements concerning propan-1-ol are correct?
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(1) It can be oxidized to give propanal.
(2) It can be oxidized to give propanoic acid.
(3) It can be dehydrated to give propene.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
164
Consider the following reaction:
Which of the following compounds is the major product of the above reaction?
A.
B.
C.
D.
165
Consider the following reactions:
Reaction 1:
Reaction 2:
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Which of the following compounds is the major product of reaction 2?
A. 1-chlorobutane
B. 2-chlorobutane
C. 1,2-dichlorobutane
D. 2,2-dichlorobutane
166
Which of the following reactions are substitution reactions?
(1) The reaction between hydrogen chloride and propan-1-ol.
(2) The reaction between hydrogen bromide and ethene.
(3) The reaction between bromine and methane.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
167
Which of the following statements concerning alcohols is INCORRECT?
A. 2-methylpropan-2-ol is a tertiary alcohol.
B. All the alcohols can be oxidized to carboxylic acids.
C. An alcohol can be dehydrated to an alkene by treating with concentrated
sulphuric acid at 180C.
D. Phosphorus trihalides can convert an alcohol to a haloalkane.
168
Which of the following reactions are correct?
(1) 3CH3CH(OH)CH2CH2CH3 + PBr3 3CH3CHBrCH2CH2CH3
(2) CH2(OH)CH2(OH) + 4[O] (COOH)2 + 2H2O
(3) CH3CH2Br + NaOH CH3CH2OH + NaBr
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
169
Which of the following compounds is/are the possible product(s) formed from the
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oxidation of butan-2-ol?
(1) Butanone
(2) Butanoic acid
(3) Butanal
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
170
Which of the following compounds could be collected from the oxidation of
pentan-1-ol?
(1) Pentanoic acid
(2) Pentanal
(3) Pentanone
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
171
Which of the following statements concerning phosphorus tribromide are correct?
(1) It can convert butan-2-ol to 2-bromobutane.
(2) It can convert but-2-ene to 2,3-dibromobutane.
(3) It is formed from the reaction between phosphorus and bromine.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
172
Which of the following compounds is/are the possible product(s) formed from the
oxidation of methanol?
(1) Methanal
(2) Methyl methanoate
(3) Methanoic acid
A. (1) only
B. (2) only
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C. (1) and (3) only
D. (2) and (3) only
173
Which of the following reactions can produce a haloalkane?
(1) The reaction between butan-1-ol and phosphorus trichloride.
(2) The reaction between but-1-ene and hydrogen bromide.
(3) The reaction between propene and chlorine solution.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
174
Which of the following compounds is the product formed from the reaction between
ethanol and solid potassium bromide in the presence of concentrated sulphuric acid?
A. CH3CH2Br
B. BrCH2CH2Br
C. CH3CH3
D. BrCH=CHBr
175
Which of the following statements concerning the compound below is/are correct?
(1) It is a primary alcohol.
(2) It reacts with acidified potassium dichromate solution to give a ketone.
(3) It reacts with hydrogen chloride to give 2,2-dichlorobutan-1-ol as the major
product.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
176
Which of the following compounds are NOT secondary alcohols?
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(1)
(2)
(3)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
177
Which of the following statements concerning the reaction between butan-1-ol and
hydrogen bromide are correct?
(1) The product of the reaction is bromobutane.
(2) The reaction involved is a substitution reaction.
(3) Hydrogen bromide should be made by heating bromine with red phosphorus.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
178
Compound X is an alcohol with the condensed formula of CH3CH(OH)C2H5. Which
of the following statements concerning compound X is/are correct?
(1) It is a secondary alcohol.
(2) It undergoes dehydration in the presence of dilute sulphuric acid at 180C to give
an alkene and water.
(3) It can be oxidized to butanoic acid.
A. (1) only
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B. (2) only
C. (1) and (3) only
D. (2) and (3) only
179
Consider the following reaction:
3CH3CH2CH2OH + PI3 3CH3CH2CH2I + Compound X
What is compound X?
A. P2O5
B. P4O10
C. H3PO3
D. H3PO4
180
Which of the following reagents can convert primary alcohols to carboxylic acids?
(1) Acidified potassium dichromate solution
(2) Acidified potassium permanganate solution
(3) Acidified potassium nitrate solution
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 46.6
181
Which of the following statements concerning propanone are correct?
(1) It has a lower boiling point than propanoic acid.
(2) It can be reduced to give propan-2-ol.
(3) It can be oxidized to give propanoic acid.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
182
Consider the following reaction:
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Which of the following compounds is the major product of the above reaction?
A.
B.
C.
D.
183
Which of the following compounds can change acidified potassium dichromate
solution from orange to green in an appropriate condition?
(1) Butanal
(2) Pentan-2-one
(3) Hexan-1-ol
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
184
Which of the following statements concerning LiAlH4 are correct?
(1) It should be stored in paraffin oil.
(2) It should be used in dry ether.
(3) It is soluble in common organic solvents.
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A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
185
Which of the following statements concerning the compound below are correct?
(1) It has no reaction towards acidified potassium dichromate solution.
(2) It can react with lithium aluminium hydride in dry ether, followed by dilute
hydrochloric acid to give
(3) It is optically inactive.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
186
Which of the following statements concerning primary alcohols is/are correct?
(1) They can be dehydrated to alkenes by treating with concentrated sulphuric acid
at 180C.
(2) They can be formed by reducing ketones with LiAlH4 in dry ether and dilute
acids.
(3) They can be formed by reacting haloalkanes with sodium hydroxide solution.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
187
Which of the following compounds is the product formed from the reaction between
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butanal and acidified potassium dichromate solution?
A. But-1-ene
B. Butan-1-ol
C. Butane
D. Butanoic acid
188
Which of the following compounds is the product formed from the reaction between
butane-2,3-dione and LiAlH4 in dry ether followed by a dilute acid?
A. 3-oxobutan-2-ol
B. 3-hydroxybutan-2-one
C. 2-hydroxybutan-3-one
D. Butane-2,3-diol
189
Which of the following compounds is the product formed from the reaction between
2-bromopent-3-one and LiAlH4 in dry ether followed by a dilute acid?
A. Pent-2,3-diol
B. 2-bromopentan-3-ol
C. 2-hydroxypentan-3-one
D. 2-bromopentan-3,3-diol
Section 46.7
190
Consider the following reaction:
Which of the following compounds is the major product of the above reaction?
A.
B.
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C.
D.
191
Consider the following reactions:
What is compound B?
A.
B.
C.
D.
192
Which of the following reagents can be used to convert propanal to propanoic acid?
A. Concentrated sulphuric acid
B. Acidified potassium dichromate solution
C. Lithium aluminium hydride in dry ether
D. Thionyl chloride
193
Which of the following reagents can be used to oxidize propan-1-ol to propanoic
acid?
(1) Acidified potassium dichromate solution
(2) Acidified potassium permanganate solution
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(3) Lithium aluminium hydride in dry ether
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
194
Which of the following compounds can be oxidized by acidified potassium
dichromate solution?
A. HCOOH
B. CH3CH2OH
C. CH3COCH2CH3
D. (CH3)3COH
195
Consider the following reactions:
Which of the following combinations is correct?
Compound X Reagent Y
A. CH3CH2CHO Concentrated H2SO4
B. CH3CH2CHO Acidified K2Cr2O7
C. CH3CH2CH2OH Concentrated H2SO4
D. CH3CH2CH2OH Acidified K2Cr2O7
196
Which of the following reactions can produce a primary alcohol?
(1) CH3CH2CH2Cl + OH
(2) CH3CH2CH2COOH + LiAlH4 in dry ether + H+
(3) CH3COCH3 + LiAlH4 in dry ether + H+
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
197
Which of the following are the functions of concentrated sulphuric acid in the
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esterification of a carboxylic acid?
(1) It acts as a catalyst.
(2) It removes water produced from the reaction.
(3) It precipitates the ester formed.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
198
Which of the following chemicals are required for converting carboxylic acids to
amides?
(1) SOCl2
(2) HNO3
(3) NH3
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
199
Which of the following compounds is the product formed from the reaction between
butanoic acid and LiAlH4 in dry ether followed by a dilute acid?
A. Butanal
B. Butan-1-ol
C. Butane
D. Butene
Section 46.8
200
Which of the following statements concerning esters are correct?
(1) An ester is a colourless volatile liquid with a characteristic sweet fruity smell.
(2) Methyl ethanoate can be hydrolysed to ethanoic acid and methanol by heating
under reflux with dilute hydrochloric acid.
(3) Methyl propanoate can be formed by heating a mixture of propanoic acid and
methanol with concentrated sulphuric acid.
A. (1) and (2) only
B. (1) and (3) only
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C. (2) and (3) only
D. (1), (2) and (3)
201
Which of the following statements concerning butan-1-ol are correct?
(1) It can be converted to but-1-ene in the presence of concentrated sulphuric acid at
180C.
(2) It can be oxidized to butanoic acid by heating under reflux with acidified
potassium dichromate solution.
(3) It is one of the products formed from the acid hydrolysis of butyl methanoate.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
202
Which of the following statements concerning acid hydrolysis of ethyl butanoate are
correct?
(1) The products of acid hydrolysis are butanoic acid and ethanol.
(2) The acid hydrolysis does not go to completion.
(3) The acid hydrolysis can be catalysed by dilute hydrochloric acid.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
203
Which of the following statements concerning hydrolysis of an ester are correct?
(1) It can be carried out either in acidic or alkaline medium.
(2) It can be catalysed by either strong acids or alkalis.
(3) It can produce an alcohol as one of the products.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 46.9
204
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Which of the following statements concerning an amide is/are correct?
(1) Alkaline hydrolysis of an amide gives ammonia.
(2) An amide can be reduced to carboxylic acid by LiAlH4 in dry ether.
(3) An amide can be formed by treating a carboxylic acid with SOCl2 and then NH3.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
205
Consider the following reaction:
Which of the following compounds are the products of the above reaction?
A.
B.
C.
D.
206
Which of the following compounds are the products formed from the alkaline
hydrolysis of propanamide with sodium hydroxide solution?
A. Propanone and ammonia
B. Propanoic acid and ammonium ion
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C. Propan-1-ol and ammonium ion
D. Sodium propanoate and ammonia
207
Which of the following compounds is the product formed from the reaction between
CH3CH2CONH2 and NaOH(aq)?
A. CH3CH2COOH
B. CH3CH2COONa+
C. CH3CH2CH2NH2
D. CH3CH2CHO
208
Which of the following reactions would give propanoic acid?
(1) The reaction between propan-2-ol and acidified potassium permanganate
solution.
(2) The reaction between methyl propanoate and water in the presence of dilute
sulphuric acid.
(3) The reaction between propanamide and water in the presence of dilute
hydrochloric acid.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
209
Which of the following reactions would give butanoate ion?
(1) Adding sodium metal to butanoic acid.
(2) Heating ethyl butanoate with dilute acid under reflux.
(3) Heating butanamide with dilute sodium hydroxide solution under reflux.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
210
Which of the following compounds are the products formed by heating a mixture of
propanamide and dilute hydrochloric acid under reflux?
(1) Propanoic acid
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(2) Ammonia
(3) Ammonium ion
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Each question below consists of two separate statements. Decide whether each of
the two statements is true or false; if both are true, then decide whether or not
the second statement is a correct explanation of the first statement. Then select
one option from A to D according to the following table:
A. Both statements are true and the 2nd statement is a correct explanation
of the 1st statement.
B. Both statements are true and the 2nd statement is NOT a correct
explanation of the 1st statement.
C. The 1st statement is false but the 2nd statement is true.
D. Both statements are false.
Sections 46.146.3
211
The hydrogenation of alkenes can be
catalysed by either platinum or nickel.
Either platinum or nickel is a metal
catalyst used to speed up the
hydrogenation.
212
The major product of the reaction
between 2-methylbut-2-ene and
hydrogen chloride is
2-chloro-2-methylbutane.
Markovnikov’s rule states that the
hydrogen atom in hydrogen chloride is
added to the carbon atom of the
carbon-carbon double bond that already
carries the larger number of hydrogen
atoms.
Sections 46.446.5
213
An alcohol can be oxidized to give an
alkene.
In dehydration, hydrogen and oxygen in
the ratio of 2:1 are eliminated from a
compound.
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214
Ethanol can be oxidized by potassium
dichromate solution.
Ethanol can be oxidized to ethanoic
acid.
Sections 46.646.7
215
Carboxylic acids can be reduced to
alcohols by mixing with LiAlH4 in
dilute acid.
LiAlH4 is a mild reducing agent.
Chemistry: Chapter 47 Inter-conversions of carbon compounds
Section 47.1
216
What is the minimum number of steps in converting propane to propanamide?
A. 2
B. 3
C. 4
D. 5
217
Which of the following reagents are needed in a two-step synthesis of 1-bromoethane
from ethanal?
(1) Hydrogen bromide
(2) Acidified potassium dichromate solution
(3) Dilute sulphuric acid
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
218
Which of the following reagents is NOT needed during the conversion of
1-chloropropane to propanamide?
A. Phosphorus trichloride
B Sodium hydroxide solution
C. Acidified potassium dichromate solution
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D. SOCl2
219
Which of the following combinations is correct for a two-step synthesis of butanone
from 2-bromobutane?
Reagent used in step 1 Reagent used in step 2
A. Sodium hydroxide solution Acidified potassium dichromate
solution
B. Phosphorus trichloride Concentrated sulphuric acid
C. Sodium hydroxide solution LiAlH4 in dry ether
D. Acidified potassium dichromate
solution
Sodium hydroxide solution
220
Consider the following multi-step synthesis:
Which of the following combinations is correct?
A B
A. 2-chloropropan-1-ol 2-chloropropanoic acid
B. 1-chloropropan-2-ol 1-chloropropanone
C. Propane-1,2-diol 2-hydroxypropanoic acid
D. Propane-1,2-diol 2-oxopropanoic acid
221
What is the minimum number of steps in converting an amide to an alkane?
A. 2
B. 3
C. 4
D. 5
222
Which of the following reagents are needed during the conversion of propanamide to
propane?
(1) Lithium aluminium hydride in dry ether
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(2) Sodium hydroxide solution
(3) Dilute hydrochloric acid
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
223
Which of the following statements concerning the conversion of 1-bromopropane to
propanamide are correct?
(1) The minimum number of steps for the conversion is two.
(2) A primary alcohol is one of the intermediate compounds.
(3) Ammonia is one of the reagents.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
224
Consider the following multi-step synthesis:
Which of the following combinations is correct?
A B
A. 4-hydroxybutanal 4-chlorobutanal
B. 4-formylbutan-1-ol 4-chlorobutan-1-ol
C. Butane-1,4-diol 1,4-dichlorobutane
D. Butane-1,4-diol 1-chlorobutane
225
Consider the following multi-step synthesis:
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Which of the following statements concerning the above synthesis is/are correct?
(1) The reagent A is dilute sulphuric acid.
(2) The reagent B is hydrogen bromide.
(3) The major product X is 1-bromopropane.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
226
Which of the following statements concerning the conversion of
1-bromo-3-chloropropane to propane-1,3-diol are correct?
(1) It is a substitution reaction.
(2) Excess sodium hydroxide solution should be used.
(3) It is a one-step synthesis.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
227
What is the minimum number of steps in converting an alkane to an amide?
A. 3
B. 4
C. 5
D. 6
228
Which of the following reagents are needed during the conversion of ethanol to
ethanamide?
(1) Ammonia
(2) Concentrated sulphuric acid
(3) Acidified potassium dichromate solution
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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229
Consider the following multi-step synthesis,
Which of the following statements concerning the above synthesis are correct?
(1) A is a dihaloalkane.
(2) The molecular formula of B is C4H10O2.
(3) C is butane-2,3-dione.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
230
Which of the following statements concerning the conversion of butan-1-ol to
butane-1,2-diol are correct?
(1) The minimum number of steps for the conversion is three.
(2) Excess sodium hydroxide solution is required.
(3) One of the intermediate compounds is a dihaloalkane.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
231
Which of the following conversions involves an acid?
(1) CH3CH2COOH CH3CH=CH2
(2) CH3CH2CH2OH CH3CH2CONH2
(3) CH3CH2COOCH3 CH3CH2CONH2
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
232
Which of the following conversions are regarded as hydrolysis?
(1) CH3CH2CONH2 CH3CH2COONa+ + NH3
(2) CH3CH2COOH CH3CH2CONH2
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(3) CH3CH2COOCH3 CH3CH2COONa+ + CH3OH
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
233
What is the minimum number of steps in converting a haloalkane to a carboxylic
acid?
A. 2
B. 3
C. 4
D. 5
234
Consider the following multi-step synthesis:
What is compound B?
A. CH3CH2COOH
B. CH3CH=CH2
C. CH3CH2CH3
D. CH3CH2CHO
235
Which of the following reagents are needed for a three-step synthesis of propene from
propanamide?
(1) LiAlH4 in dry ether
(2) Concentrated H2SO4
(3) Dilute H2SO4
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
236
When butan-2-ol is heated with concentrated sulphuric acid at 180C, the possible
products are
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(1) but-1-ene.
(2) but-2-ene.
(3) butanone.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
237
In an experiment, 2-chloropropane was converted to propanone by the following
synthetic route.
Which of the following combinations is correct?
Reagent X Reagent Y
A. SOCl2 Dilute NaOH
B. Dilute NaOH Acidified K2Cr2O7
C. Dilute NaOH LiAlH4/dry ether
D. Concentrated H2SO4 Acidified K2Cr2O7
238
Propene can be converted to propanone by the following synthetic route.
Which of the following combinations is correct?
X Y
A. Propan-1-ol 1-chloropropane
B. 1-chloropropane Propan-1-ol
C. Propan-2-ol 2-chloropropane
D. 2-chloropropane Propan-2-ol
239
Consider the following multi-step synthesis:
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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Which of the following combinations is correct?
Type of reaction A Type of reaction B
A. Addition Chlorination
B. Substitution Chlorination
C. Dehydration Addition
D. Dehydration Substitution
240
When ethanol is heated with acidified potassium dichromate solution, the possible
products are
(1) ethanal.
(2) ethanoic acid.
(3) ethyl ethanoate.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
241
Which of the following reagents are required for the conversion of propanamide to
1-chloropropane?
(1) Dilute hydrochloric acid
(2) Phosphorus trichloride
(3) Lithium aluminium hydride in dry ether
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
242
Consider the following multi-step synthesis:
Which of the following combinations is correct?
Reagent A Reagent B
A. Dilute NaOH HCl
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©Aristo Educational Press Ltd. 2010 468
B. Concentrated H2SO4 HCl
C. Acidified K2Cr2O7 Cl2/CCl4
D. LiAlH4/dry ether Cl2/CCl4
243
What is the minimum number of steps in converting propene to propanone?
A. 1
B. 2
C. 3
D. 4
244
Which of the following reagents is NOT needed during the conversion of ethene to
ethanamide?
A. Ammonia gas
B. Sodium hydroxide solution
C. Chlorine gas
D. Acidified potassium dichromate solution
245
Which of the following reagents is NOT needed during the conversion of
2-bromo-2-methylbutane to 2-methylbutane?
A. Concentrated sulphuric acid
B. Phosphorus trichloride
C. Hydrogen gas
D. Nickel catalyst
246
Which of the following statements concerning the preparation of ethanal from ethanol
are INCORRECT?
(1) Concentrated sulphuric acid is used as a catalyst in the reaction.
(2) In order to obtain ethanal, the reaction mixture should be heated under reflux for
about 20 to 30 minutes.
(3) The reaction mixture should be heated in a water bath.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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247
Consider the following multi-step synthesis:
Which of the following is compound Z?
A. CH3CH3
B. CH3CHO
C. CH3COOH
D. CH3CH2OH
248
Which of the following reagents are required during the conversion of ethene to
ethanoic acid?
(1) Dilute NaOH
(2) Concentrated H2SO4
(3) HCl
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
249
Which of the following statements concerning the conversion of ethene to ethanoic
acid are correct?
(1) The minimum number of steps in converting ethene to ethanoic acid is three.
(2) A secondary alcohol is one of the intermediate compounds.
(3) Dilute sodium hydroxide solution is one of the reagents.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
250
Consider the following multi-step synthesis:
Which of the following is compound R?
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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A. CH3CH3
B. CH3CH2Cl
C. CH3CCl3
D. CCl3CCl3
251
Which of the following reagents are required during the conversion of CH3CH2OH to
CCl3CCl3?
(1) H2
(2) Concentrated H2SO4
(3) Excess Cl2 in CCl4
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
252
Which of the following statements concerning the conversion of CH3CH2OH to
CCl3CCl3 are correct?
(1) The minimum number of steps in converting CH3CH2OH to CCl3CCl3 is three.
(2) An alkane is one of the intermediate compounds.
(3) Excess Cl2 in CCl4 is one of the reagents.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
253
Consider the following multi-step synthesis:
Which of the following is compound Y?
A. Ethane
B. Ethanol
C. 1-chloroethane
D. 2-chloroethane
254
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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Which of the following statements concerning the conversion of ethanoic acid to
1-chloroethane are correct?
(1) A primary alcohol is one of the intermediate compounds.
(2) The minimum number of steps in converting ethanoic acid to 1-chloroethane is
two.
(3) Dilute acid is one of the reagents.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
255
Consider the following multi-step synthesis:
Which of the following is compound Y?
A. Pentanamide
B. 2,2-dimethylpropanoic acid
C. 2,2-dimethylpropanamide
D. 1-amino-2,2-dimethylpropanone
256
Which of the following reagents are needed during the conversion of C(CH3)3CHO to
C(CH3)3CONH2?
(1) SOCl2
(2) NH3
(3) H2
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
257
Which of the following statements concerning the conversion of propanone to
propene are correct?
(1) The minimum number of steps for the conversion is two.
(2) A secondary alcohol is one of the intermediate compounds.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(3) Lithium aluminium hydride in dry ether is one of the reagents.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
258
Which of the following reagents are needed during the conversion of butanone to
2-chlorobutane?
(1) Phosphorus trichloride
(2) Lithium aluminium hydride in dry ether
(3) Dilute hydrochloric acid
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
259
Consider the following multi-step synthesis:
Which of the following combinations is correct?
Compound A Reagent B Compound C
A. CH3CH2CHO Dilute HCl CH3CH2CH2OH
B. CH3CH2COH Dilute NaOH CH3COCH3
C. CH3CH2COONa+ Dilute HCl CH3CH2CH2OH
D. CH3CH2COONa+ Dilute NaOH CH3CH2CHO
260
Which of the following statements concerning the conversion of propanamide to
propan-1-ol are correct?
(1) The minimum number of steps for the conversion is three.
(2) A carboxylic acid is one of the intermediate compounds.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(3) Lithium aluminium hydride is one of the reagents for the conversion.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
261
Consider the following multi-step synthesis:
Which of the following combinations is correct?
Compound P Compound R
A. CH3COOH CH3OH
B. CH3OH CH3COOH
C. CH3COONa+ CH3OH
D. CH3OH CH3COONa+
262
Consider the following multi-step synthesis:
Which of the following combinations is correct?
Compound P Compound R
A . HCHO CH3COOH
B. HCOOH CH3COOH
C. C H3COOH HCOOH
D. CH3COOH HCHO
263
h of the following conversions involve a reducing agent?
H
Whic
(1) CH3CHO CH2=CH2
(2) CH2=CH2 CH3CH2O
(3) CH3COOH CH3CH2Cl
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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264
is the minimum number of steps in converting an alkane to an aldehyde?
265
ider the following multi-step synthesis:
What
A. 2
B. 3
C. 4
D. 5
Cons
Which of the following combinations is correct?
Reagent X Compound Y Compound Z
A Acid O7 . ified K2Cr2 CH3COOH CH3OH
B. C oncentrated H2SO4 CH2=CH2 CH3OH
C. Acidified K2Cr2O7 C CH H3COOH 3CH2OH
D. C oncentrated H2SO4 CH2=CH2 CH3CH2OH
266
h of the following compounds CANNOT be converted to an alcohol in a single
. Propanone
267
h of the following statements about converting 2-chloropropane to propanone
version is a two-step synthesis.
sodium hydroxide solution.
Whic
step?
A
B. Propanal
C. Propane
D. Propene
Whic
are correct?
(1) The con
(2) One of the reagents of the conversion is
(3) A secondary alcohol is an intermediate compound.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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268
h of the following reagents are needed during the conversion of propanamide to
entrated H2SO4
and (2) only
Section 47.2
Whic
propene?
(1) Conc
(2) Dilute HCl
(3) LiAlH4
A. (1)
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
23.0 g of ethanol reacts with 48.5 g of hydrogen bromide, 32.7 g of
270
1 mole of ethanol is oxidized by heating with acidified potassium dichromate
acid is 80.0%.
e oxidation.
oxidation.
271
ider the following multi-step synthesis:
269
When
bromoethane is obtained. What is the percentage yield of bromoethane?
A. 30.0%
B. 50.1%
C. 60.0%
D. 70.3%
When
solution, 0.8 mole of ethanoic acid is obtained. Which of the following statements
concerning the oxidation are correct?
(1) The percentage yield of ethanoic
(2) Ethanal is an intermediate compound in the abov
(3) Acidified KMnO4 can replace acidified K2Cr2O7 in the above
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Cons
The overall percentage yield is 36%. hat is the percentage yield for converting C to W
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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D?
A. 80%
272
is the overall yield of the following synthesis?
B. 75%
C. 65%
D. 60%
What
A. 24%
273
4.6 g of ethanol is heated with concentrated sulphuric acid, 1.4 g of ethene is
274
is the overall yield of the following synthesis?
B. 48%
C. 50%
D. 60%
When
obtained. What is the percentage yield of ethene?
A. 10.0%
B. 30.4%
C. 50.0%
D. 60.9%
What
A. 10.0%
275
70.0 g of chloroethane mixed with excess sodium hydroxide solution, 27.0 g of
B. 14.4%
C. 30.0%
D. 40.0%
When
ethanol was obtained. What is the percentage yield of ethanol?
A. 27.0%
B. 38.6%
C. 53.9%
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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D. 71.6%
276
h of the following statements about planning a synthetic route are correct?
277
28.0 g of ethene reacts with excess hydrogen chloride, 38.0 g of chloroethane is
278
verall yield of the following synthesis is 28%. What is the percentage yield for
Whic
(1) The planned route should produce little or no by-products.
(2) The planned route should involve as few steps as possible.
(3) The percentage yield of planned route should be over 50%.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
When
obtained. What is the percentage yield of chloroethane?
A. 38.0%
B. 58.9%
C. 66.0%
D. 73.7%
The o
converting B to C?
A. 14%
279
12.0 g of butan-1-ol and 10.2 g of ethanoic acid were mixed and heated under
B. 28%
C. 50%
D. 75%
When
reflux with a few cm3 of concentrated sulphuric acid, 5.8 g of ester was obtained.
What is the percentage yield of the ester formed?
A. 56.9%
B. 48.3%
C. 30.9%
D. 29.4%
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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280
experiment, 10.5 g of methyl ethanoate was heated under reflux with a dilute
281
10 cm3 of methanoic acid (density = 1.2 g cm3) was heated under reflux with
Section 47.3
In an
acid to give a mixture of ethanoic acid and methanol. Then, pure ethanoic acid was
distilled out from the product mixture and required 100 cm3 of 0.5 M sodium
carbonate solution for complete neutralization. What is the percentage yield of
ethanoic acid?
A. 35.2%
B. 57.1%
C. 70.4%
D. 81.1%
When
10 cm3 of ethanol (density = 0.8 g cm3) in the presence of acid catalyst, 8.5 g of ethyl
methanoate was obtained. What is the percentage yield of ethyl methanoate?
A. 42.5%
B. 44.0%
C. 65.9%
D. 70.8%
h of the following statements about using a reflux condenser in a laboratory
m the reaction mixture during heating.
283
laboratory preparation of an ester, a distillate is obtained after distilling the
wing statements concerning the distillate are correct?
282
Whic
preparation of an ester are correct?
(1) It condenses vapour formed fro
(2) It prevents the loss of volatile substances on prolonged heating.
(3) It must be kept open to the atmosphere during heating.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
In a
product mixture.
Which of the follo
(1) The distillate has a much lower percentage of water.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(2) The distillate is mixed with excess sodium carbonate solution to remove any
(3) be redistilled to obtain pure ester.
284
aboratory preparation of an ester, a mixture of an alcohol and a carboxylic acid is
m carbonate solution
e
Each question below consists of two separate statements. Decide whether each of
correct explanation
B. ue and the 2nd statement is NOT a correct
C. nd statement is true.
acidic substances.
The distillate has to
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
In a l
heated under reflux in the presence of acid catalyst. Then, a distillate is obtained after
distilling the product mixture. Which of the following reagents are used to purify the
distillate?
(1) Sodiu
(2) Calcium chloride solution
(3) Anhydrous calcium chlorid
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
the two statements is true or false; if both are true, then decide whether or not
the second statement is a correct explanation of the first statement. Then select
one option from A to D according to the following table:
A. Both statements are true and the 2nd statement is a
of the 1st statement.
Both statements are tr
explanation of the 1st statement.
The 1st statement is false but the 2
D. Both statements are false.
ections 47.147.3S
entrated sulphuric acid is used in Concentrated sulphuric acid is an
285
Conc
the laboratory preparation of ester. oxidizing agent.
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286
e laboratory preparation of an
In the laboratory preparation of an ester,
med.
In th
ester, concentrated sulphuric acid is
used as a catalyst.
concentrated sulphuric acid drives the
equilibrium of esterification to the
product side by removing water for
287
eflux condenser is used to
e
The reflux condenser should be kept
.
The r
condense vapour formed from th
reaction mixture during heating.
open to the atmosphere during heating
Chemistry: Chapter 48 Important organic substances
ection 48.1
S
h of the following compounds is NOT a carbohydrate?
289
h of the following statements about glucose and fructose are correct?
orm.
290
h of the following statements concerning simple sugars are correct?
ars.
288
Whic
A. C6(H2O)6
B. C5H10O5
C. C3H6O3
D. C7H15O7
Whic
(1) They have the same molecular formula.
(2) They are chain isomers.
(3) They can exist in a ring f
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
(1) Their general formula is Cx(H2O)y.
(2) Glucose and fructose are simple sug
(3) They are insoluble in water.
A. (1) and (2) only
B. (1) and (3) only
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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C. (2) and (3) only
D. (1), (2) and (3)
291
h of the following statements concerning glucose and fructose are correct?
292
h of the following functional groups are present in fructose?
ly
293
ider the following structure:
Whic
(1) They have different numbers of chiral carbon atoms.
(2) They are position isomers.
(3) They are soluble in water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
(1) Hydroxyl group
(2) Ketone group
(3) Aldehyde group
A. (1) and (2) on
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Cons
What is the above compound?
A. Fructose
B. Glucose
C. Sucrose
D. Starch
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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294
ider the following structure: Cons
What is the above comp
Section 48.2
ound?
A. Fructose
B. Glucose
C. Sucrose
D. Starch
h of the following statements about animal fats are correct?
s derived from long-chain
(3) ycerol which has three OH groups.
296
h of the following functional groups present in an unsaturated fat molecule?
double bond
ly
297
h of the following are unsaturated fatty acids?
295
Whic
(1) They are generally solids at room temperature.
(2) They contain a higher proportion of triglyceride
unsaturated fatty acids.
They are formed from gl
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
(1) Ester group
(2) Carbon-carbon
(3) Carboxyl group
A. (1) and (2) on
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(1) Oleic acid
(2) Linoleic acid
only
298
h of the following statements concerning animal fats and vegetable oils are
al fats have a higher percentage of saturated triglycerides than vegetable
(2) g too much animal fats will raise blood cholesterol level.
nditions
2) only
299
h of the following statements concerning fatty acids are correct?
arbon-carbon double bonds, the
(3) rboxylic acids containing 11 to 23 carbon atoms.
300
h of the following statements about olive oil derived from oleic acid
t room temperature.
acids.
(3) Palmitic acid
A. (1) and (2)
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
correct?
(1) Anim
oils.
Eatin
(3) Animal fats and vegetable oils are solids and liquids at room co
respectively.
A. (1) and (
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
(1) They are one of the components of fats and oils.
(2) If the hydrocarbon chain of a fatty acid contains c
fatty acid is saturated.
They are long-chain ca
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Whic
(CH3(CH2)7CH=CH(CH2)7COOH) is/are INCORRECT?
(1) It is a vegetable oil.
(2) It is usually a solid a
(3) It has a higher content of unsaturated fatty
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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A. (1) only
B. (2) only
C. (1) and (3) only
301
h of the following statements concerning vegetable oils is INCORRECT?
ogenation.
s derived
D.
302
h of the following statements concerning glucose are correct?
d potassium dichromate solution to give a green solution.
303
iagram below shows the structure of a vegetable oil molecule. R1, R2 and R3 are
D. (2) and (3) only
Whic
A. The chemical structures of vegetable oils are triesters.
B. Vegetable oils can be converted into margarine by hydr
C. Vegetable oils generally contain a higher proportion of triglyceride
from long-chain unsaturated fatty acids.
All vegetable oils are optically inactive.
Whic
(1) It is a carbohydrate.
(2) It reacts with acidifie
(3) It reacts with iodine solution to give a dark blue solution.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
The d
hydrocarbon chains containing the same number of carbon atoms but different
numbers of C=C bonds.
Which of the following statements concerning the vegetable oil molecule is/are
optically active.
lymer of glycerol and fatty acids.
correct?
(1) It is
(2) It is a condensation po
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(3) The vegetable oil becomes solid after hydrogenation in the presence of a metal
ly
304
olecule is shown below:
catalyst.
A. (1) only
B. (2) only
C. (1) and (3) on
D. (2) and (3) only
A fat m
Which of the following functional groups is present in the fat molecule?
Section 48.3
A. Hydroxyl group
B. Ketone group
C. Ester group
D. Carboxyl group
h of the following statements concerning proteins are correct?
teins.
roteins.
306
ment of a polypeptide is shown below:
305
Whic
(1) Proteins are long polypeptide chains.
(2) There are many amide linkages in pro
(3) Water is eliminated during the formation of p
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
A seg
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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Which of the following amino acids make up the segment?
(1)
(2)
(3)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
307
Which of the following statements concerning amino acids are correct?
(1) Each amino acid molecule contains an amino group and a carboxyl group.
(2) All amino acid molecules have a chiral carbon atom and thus can rotate the plane
of polarized light.
(3) Amino acid molecules undergo condensation reaction to give protein.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
308
Which of the following statements concerning protein is/are correct?
(1) It is a natural polymer.
(2) It is an addition polymer.
(3) All amino acids are optically active.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
309
A segment of a polypeptide is shown below:
Which of the following functional groups is present in the individual amino acids that
make up the polypeptide?
A. Amino group
B. Amide group
C. Ketone group
D. Carbonyl group
Section 48.4
310
Which of the following functional groups is NOT present in aspirin?
A. Carbonyl group
B. Benzene ring
C. Ester group
D. Carboxyl group
311
Which of the following functional groups is NOT present in aspirin?
A. Ester group
B. Benzene ring
C. Hydroxyl group
D. Carboxyl group
312
Which of the following functional groups does aspirin contain?
(1) Carboxyl group
(2) Hydroxyl group
(3) Ester group
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A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
313
Which of the following statements concerning aspirin are correct?
(1) It is an ester.
(2) It is a painkiller.
(3) Low dose of aspirin prevents stroke.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
314
Which of the following functional groups are present in aspirin?
(1) Carboxyl group
(2) Amide group
(3) Benzene ring
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
315
Consider the following structure of paracetamol:
Which of the following functional groups are present in paracetamol?
(1) Amide group
(2) Ketone group
(3) Hydroxyl group
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
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D. (1), (2) and (3)
316
Which of the following are the functional groups that can be found in acetylsalicylic
acid (aspirin)?
(1) Aldehyde group
(2) Carboxyl group
(3) Ester group
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
317
Which of the following are the major products when aspirin is heated with sodium
hydroxide solution under reflux?
(1) CH3COONa+
(2)
(3)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
318
Which of the following are the functions of aspirin?
(1) Relieving pain
(2) Reducing inflammation and fever
(3) Reducing the risk of heart attack
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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Section 48.5
319
Which of the following statements about soapy detergents are correct?
(1) Their structures have a hydrophilic head and a hydrophobic tail.
(2) They are made from petroleum.
(3) They form scum with calcium ions in hard water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
320
Which of the following statements about soapless detergents are correct?
(1) They have wetting and emulsifying properties.
(2) They are usually sodium salts of long-chain alkylsulphate.
(3) They form lather with magnesium ions in hard water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
321
Which of the following sequences is correct for the cleaning action of soaps and
soapless detergents?
(1) The hydrophobic tails of detergent anions dissolve in grease.
(2) The grease forms tiny droplets, forming an emulsion.
(3) Water can enter small spaces to wet the object thoroughly.
(4) Water molecules attract the hydrophilic heads of detergent anions, lifting up the
grease from surface.
A. (4), (1), (2), (3)
B. (1), (4), (2), (3)
C. (4), (3), (1), (2)
D. (3), (1), (4), (2)
322
Which of the following statements concerning soapy detergents is/are INCORRECT?
(1) Soapy detergents are always acidic.
(2) Each soapy detergent anion contains an ionic head and a hydrocarbon chain.
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(3) Soapy detergents are made from petroleum.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
323
Which of the following organic substances contain(s) carboxylate group?
(1) Soap
(2) Glycerol
(3) Aspirin
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
324
Which of the following statements concerning soapy detergents are correct?
(1) They are always alkaline.
(2) They are made from chemicals obtained from petroleum.
(3) The ionic head of soapy detergent is always a carboxylate group.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
325
Which of the following statements concerning a detergent anion is/are correct?
(1) It contains a hydrophobic head and a hydrophilic tail.
(2) It is attracted to both water and oil molecules.
(3) Its ionic head must be a carboxylate group.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
326
Which of the following statements concerning saponification are correct?
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(1) It involves sodium hydroxide solution.
(2) It is used to prepare soapless detergents.
(3) It gives glycerol as the by-product.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
327
Which of the following statements concerning hard water are correct?
(1) It contains considerable concentrations of calcium and/or magnesium ions.
(2) Soapless detergents work properly in it.
(3) Both lather and scum are formed when soap works in it.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
328
Which of the following products are formed when peanut oil is boiled with sodium
hydroxide solution?
(1) Propane-1,2,3-triol
(2) Soapy detergents
(3) Ester
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
329
Soapy detergents do not work properly in acidic medium because
A. soapy detergents form esters with acids.
B. soapy detergents react with acids to form an insoluble scum.
C. soapy detergents decompose in acids.
D. soapy detergents form fatty acid in acids.
330
Which of the following is a correct general structure for a detergent particle?
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A.
B.
C.
D.
331
Which of the following are the correct structures for soapless detergents?
(1)
(2)
(3)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
332
Which of the following is/are the correct structure(s) for soaps?
(1)
(2)
(3)
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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333
Which of the following statements concerning the wetting property of detergents are
correct?
(1) It reduces the surface tension of water.
(2) It enables water to wet things more efficiently.
(3) It emulsifies grease.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
334
Which of the following statements concerning the arrangement of detergent anions in
an oil-water mixture are correct?
(1) Before shaking the mixture, the ionic heads of the detergent anions dissolve in
water.
(2) Before shaking the mixture, the hydrocarbon tails of the detergent anions
dissolve in the oil.
(3) After shaking the mixture, negatively charged oil droplets are formed.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
335
Which of the following statements concerning hard water is/are correct?
(1) Hard water contains considerable concentrations of calcium and/or magnesium
ions.
(2) Soaps form lather in hard water.
(3) Both soaps and soapless detergents work well in hard water.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
336
Consider the following statements:
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(1) The hydrophobic tails of detergent anions dissolve in grease.
(2) By stirring, the grease is broken down into tiny droplets, forming an emulsion.
(3) A detergent enables water to wet the object thoroughly.
(4) Water molecules attract the hydrophilic heads of detergent anions, lifting up the
grease from the surface.
Which of the following is a correct sequence of the above statements for describing
how a detergent removes grease from a surface?
A. (1), (2), (3), (4)
B. (1), (4), (3), (2)
C. (3), (1), (4), (2)
D. (3), (4), (2), (1)
337
Which of the following substances are the starting materials for making soaps?
(1) Animal fats
(2) Vegetable oils
(3) Chemicals obtained from petroleum
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
338
Which of the following statements concerning soaps and soapless detergents is/are
correct?
(1) Both of them work well in hard water.
(2) Both have wetting and emulsifying properties.
(3) Both are made from fats or oils.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
339
Which of the following statements about detergents are correct?
(1) Detergents reduce the surface tension of water and enable water to wet things
more easily.
(2) Detergents are emulsifying agents which mix oil and water together.
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(3) Detergents are made from animal fats.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
340
Which of the following statements about soapy detergents is/are correct?
(1) They form lather in hard water.
(2) They can be prepared by heating vegetable oils with sodium hydroxide solution.
(3) They react with the sodium ions to form scum.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
341
Which of the following combinations concerning the general structure of a detergent
anion is correct?
The head The tail
A. Hydrophobic Hydrophilic
B. Hydrophobic Hydrophobic
C. Hydrophilic Hydrophobic
D. Hydrophilic Hydrophilic
342
Which of the following is/are soapy detergent(s)?
(1) (2)
(3)
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
343
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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Which of the following diagrams correctly shows the detergent anions arrange
themselves in an oil droplet?
A.
B.
C.
D.
344
Which of the following statements about adding a detergent to an oil-water mixture
are correct?
(1) The heads of detergent anions dissolve in the oil.
(2) Oil droplets are formed after shaking the mixture.
(3) The oil droplets are negatively charged and disperse throughout the water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
345
Which of the following statements concerning detergents are correct?
(1) Detergents are substances which have cleaning power.
(2) Detergents are substances which enhance the cleaning power of water.
(3) Detergents work as a wetting agent and an emulsifying agent.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
346
Which of the following are detergents?
(1) C17H35COOK
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(2) C12H25OSO3Na
(3) C17H35COOH
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
347
Why are soapless detergents called ‘soapless’?
A. They do not have the cleaning power as soaps.
B. They do not contain any soap.
C. They do not form any lather when they are shaken with water.
D. They cannot be used together with soaps.
348
Which of the following diagrams represents the correct structure of a detergent
particle?
A.
B.
C.
D.
Ionic head Hydrocarbon tail
349
Which of the following is the structure of a soapy detergent particle?
A. B.
C.
D.
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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350
Which of the following is the structure of a soapless detergent particle?
A. B.
C.
D.
351
Which of the following diagrams represents the detergent solution on a piece of cloth?
A.
B.
C.
D.
352
Which of the following diagrams correctly represents a mixture of water and oil (with
a little detergent added) after shaking and allowing it to stand?
A.
B.
C.
D.
353
Which of the following diagrams correctly represents the arrangement of detergent
anions in an oil-water mixture after shaking?
water + oil
droplets
water and o
solution
il
water
oil water
oil
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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A.
B.
C. D.
354
Which of the following statements about detergents are correct?
(1) A detergent is sometimes known as a surfactant.
(2) The hydrocarbon tails of detergent anions contain 12 to 20 carbon atoms in
general.
(3) Detergents form scum in hard water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
355
Which of the following statements about soaps is correct?
A. They are usually potassium salts of long-chain carboxylic acids.
B. They are usually long-chain organic acids.
C. They are usually long-chain covalent molecules.
D. They are usually long-chain polymers.
356
Which of the following represents a soapy detergent with good cleaning power?
A. C2H5COONa+
B. C17H35COOK+
C. C17H35COOH
D. C17H35OSO3Na+
357
A glass of water is used to test with soapy and soapless detergents. The results are
shown below:
Soapy detergent Soapless detergent
water
oil droplet
water
oil droplet
water
oil droplet
water
oil droplet
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Scum a lot no
Lather little a lot
What is in the glass?
A. Distilled water
B. Soft water
C. Deionized water
D. Sea water
358
When vegetable oil is boiled with sodium hydroxide solution, a product mixture is
obtained. Then concentrated sodium chloride solution is added to the product mixture,
a creamy yellow solid is obtained. Which of the following statements is
INCORRECT?
A. Glycerol is formed in the process as a by-product.
B. The step of adding concentrated sodium chloride solution is called ‘salting
out’.
C. The creamy yellow solid is an ester.
D. The creamy yellow solid can be used to remove grease.
359
Which of the following combinations for making a soapy detergent is correct?
A. Butter + sodium hydroxide solution
B. Palm oil + calcium hydroxide solution
C. Crude oil + potassium hydroxide solution
D. Paraffin oil + sodium hydroxide solution
360
Grease and oil in ovens or kitchen sinks are readily removed by concentrated sodium
hydroxide solution. Which of the following statements concerning the reaction
involved are correct?
(1) The grease and oil are hydrolysed by concentrated sodium hydroxide solution.
(2) A lot of heat is evolved when concentrated sodium hydroxide dissolves in water.
(3) Concentrated sodium hydroxide solution reacts with grease and oil to give
products which are soluble in water and can go through the drains.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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361
Which of the following alkalis is usually used to prepare bath soaps?
A. Sodium hydroxide
B. Ammonia
C. Potassium hydroxide
D. Calcium hydroxide
362
Under which of the following conditions do soapy detergents work improperly?
(1) Acidic medium
(2) Sea water
(3) Hard water
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
363
Which of the following substances is usually NOT the additives of washing powders?
A. Bleach
B. Alkali
C. Enzymes
D. Perfumes
364
Which of the following compounds are the possible products when a soapy detergent
is added to a sample of acidic sea water?
(1) (CH3(CH2)16COO)2Ca
(2) (CH3(CH2)16COO)2Mg
(3) CH3(CH2)16COOH
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
365
Which of the following ways can prevent soaps from forming scum in hard water?
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(1) Adding phosphates in hard water.
(2) Adding washing soda in hard water.
(3) Adding sodium chloride in hard water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
366
Which of the following substances can form scum with soaps?
A. Sea water
B. Distilled water
C. Tap water
D. Deionized water
367
Which of the following statements about adding dilute hydrochloric acid into a soapy
detergent solution are correct?
(1) Solid ester is formed.
(2) White precipitate is produced.
(3) Cleaning action of the soapy detergent solution is lost.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
368
Which of the following combinations concerning detergents is correct?
Soapy detergent Soapless detergent
A.
B. C.
D.
369
Soaps have a cleaning property because they
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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(1) emulsify oil with water.
(2) increase the cohesive forces between water molecules.
(3) enable water to spread over the surface and wet it more easily.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
370
After the formation of soap by heating vegetable oil with sodium hydroxide solution,
what is added to the product mixture to obtain solid soap?
A. Sodium hydroxide
B. Brine
C. Small piece of solid soap
D. Calcium carbonate
371
Which of the following solutions can form scum with soapy detergents?
(1) Magnesium chloride solution
(2) Sodium chloride solution
(3) Calcium chloride solution
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
372
The formula of certain soap is CnH2n+1COONa and the relative molecular mass of it is
between 240 and 245. What is the value of n?
A. 12
B. 13
C. 14
D. 15
373
What could be observed when soapy detergent is added to lime water?
A. lather is formed.
B. The solution turns pink.
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C. White precipitate is formed.
D. The solution is divided into two layers.
374
Which of the following statements about soapy detergents is INCORRECT?
A. They contain carboxylate group (COO).
B. They form scum in hard water.
C. They can be ‘tailor-made’ to suit a particular cleaning purpose.
D. They can be made by reacting animal fats with sodium hydroxide solution.
375
Pipe cleaners are commonly used at home to clean drainpipes. On the label of pipe
cleaner containers, safety direction is usually printed as, ‘Wear rubber gloves and
avoid contact with skin and eyes when using.’ Why this safety direction must be
followed?
A. The active ingredient is detergent which makes skin rough and dry.
B. The active ingredient is sodium hydroxide solution which is corrosive.
C. The active ingredient is enzyme which digests the grease.
D. The active ingredient is bleach which is corrosive and bleaches the skin.
376
Consider the following reaction:
Coconut oil + Sodium hydroxide solution Soap + Substance X
Which of the following compounds is substance X?
A. Ethanol
B. Water
C. Glycerol
D. Triester
377
Which of the following CANNOT be used in making soaps?
A. Palm oil
B. Lard
C. Paraffin oil
D. Linseed oil
378
What is another name for saponification?
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A. Redox reaction
B. Alkaline hydrolysis of animal fats or vegetable oils
C. Acidic hydrolysis of animal fats and vegetable oils
D. Dehydration
379
Which of the following statements concerning soapless detergents is/are correct?
(1) They work properly in hard water.
(2) They form scum in hard water.
(3) Bath soaps are soapless detergents.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
380
The diagram below shows the structure of a detergent particle:
Which of the following statements about the detergent are INCORRECT?
(1) It is made from vegetable oils.
(2) Its ionic head is hydrophobic.
(3) It forms scum in hard water.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Section 48.6
381
Which of the following organic substances contain amide linkages?
(1) Proteins
(2) Nylon
(3) Polyesters
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
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382
The general repeating unit of nylon is shown below:
Which of the following statements concerning the repeating unit are correct?
(1) R and R’ refer to hydrocarbon chains.
(2) Nylon is made up by many repeating units.
(3) The linkage is called amide linkage.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
c tements concerning nylon is/are INCORRECT?
(3) The general repeating unit of nylon is
383
Whi h of the following sta
(1) Nylon is a polyester.
(2) It contains peptide linkages.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
on 48.7Secti
hic organic substances has amide linkages?
ide
384
W h of the following
A. Triglycer
B. Glucose
C. Nylon
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D. Polyester
llowing polymers is/are linked by amide linkages?
D. (2) and (3) only
(2) d polyesters are joined by amide linkages and ester
) etic fibres involved a condensation reaction.
D. (1), (2) and (3)
llowing organic substances are condensation polymers?
D. (1), (2) and (3)
re the possible monomers of a polyester?
H2COOH
) C COOH
385
Which of the fo
(1) Protein
(2) PET
(3) Polystyrene
A. (1) only
B. (2) only
C. (1) and (3) only
386
Which of the following statements about synthetic fibres are correct?
(1) Nylon and polyesters are synthetic substitute of wool and silk.
Monomers of nylon an
linkages respectively.
(3 The synthesis of synth
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
387
Which of the fo
(1) Protein
(2) Nylon 6,6
(3) Terylene
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
388
Which of the following compounds a
(1) HOOCCH2CH2CH2C
(2) CH3CH2CH2CH2OH
(3 HO H2CH2CH2CH2
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
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A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
llowing organic substances contain ester groups?
) y
D. (1), (2) and (3)
f
tatement. Then select
one
A. ue and the 2nd statement is a correct explanation
B. nd statement is NOT a correct
ut the 2nd statement is true.
D. Both statements are false.
389
Which of the fo
(1) Proteins
(2) Aspirin
(3 Pol esters
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
Each question below consists of two separate statements. Decide whether each o
the two statements is true or false; if both are true, then decide whether or not
the second statement is a correct explanation of the first s
option from A to D according to the following table:
Both statements are tr
of the 1st statement.
Both statements are true and the 2
explanation of the 1st statement.
C. The 1st statement is false b
Section 48.1
e oxidized to give
carboxylic acid.
Fructose has a ketone group.
390
Fructose cannot b
bohydrate and
has an aldehyde group.
bohydrate
and has an aldehyde group.
391
Fructose is a kind of car Glucose is also a kind of car
on 48.2Secti
392
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Glycerol is insoluble in water. omponent of
triglycerides.
Glycerol is a c
sually liquids at
room temperature.
turated fatty acids in cis
configuration.
393
Vegetable oils are u Vegetable oils are derived from
long-chain unsa
ons 48.348.5Secti
etergents are always
alkaline.
lbenzenesulphonate and
alkylsulphate.
394
Soapless d Soapless detergents are sodium salts of
long-chain alky
ents form lather easily
in hard water.
r
or magnesium ions in hard
water.
395
Soapless deterg The ionic heads of soapless detergent
particles do not precipitate with eithe
calcium
Detergents are always alkaline.
/oils and sodium
hydroxide solution.
396
Soapy detergents are made from the
reaction between fats
wet a cloth
more easily than water.
t reduces the surface tension
of water.
397
A detergent solution can A detergen
Shampoos are soapless detergents. hemicals
obtained from petroleum.
398
Shampoos are made from c
m salts of
long-chain carboxylic acids.
rgents are made from
animal fats.
399
Soapless detergents are sodiu Soapless dete
400
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 511
In the presence of detergent, oil and
water can mix together.
Detergent is a wetting agent.
401
Detergents can remove grease and dirt
from a surface.
Detergents have both wetting and
emulsifying properties.
402
When a detergent is mixed with water,
effervescence occurs.
Lather is formed when a detergent is
mixed with water.
403
Detergents can dissolve in both water
and grease.
Each detergent particle has a
hydrophilic head and a hydrophobic
tail.
404
After saponification is completed,
concentrated sodium chloride solution
is added to separate the soaps from the
solution.
Concentrated sodium chloride solution
lowers the solubility of soaps in water.
405
Bath soaps are soapy detergents. Bath soaps are made from animal fats
and sodium hydroxide solution.
406
Soapless detergents work well in hard
water.
Hard water contains considerable
concentrations of magnesium ions and
calcium ions.
407
Soapy detergents do not work well in
hard water.
Soap anions react with calcium and/or
magnesium ions in hard water to give
insoluble scum.
408
HKDSE Chemistry A Modern View Part XI Chemistry of Carbon Compounds
©Aristo Educational Press Ltd. 2010 512
Soapy detergents work well in acidic
water.
When soapy detergents are added to
acidic water, long-chain carboxylic
acids are formed.
409
Soapy detergents work properly in sea
water.
Sea water does not contain any
magnesium ions and calcium ions.
410
Washing soda is a water softener. Washing soda removes calcium and
magnesium ions as insoluble
carbonates.
Sections 48.648.7
411
Both nylon and polyesters are
insoluble in water.
Nylon contains amide linkages while
polyesters contain ester linkage.