SMSS MYE 2012 _4E_ Chemistry _P1_QP.docx

7/29/2019 SMSS MYE 2012 _4E_ Chemistry _P1_QP.docx

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Secondary Four Express

2 May 2012

Paper 1 Multiple Choice

Duration: 1 Hour

Additional Materials: Multiple Choice Answer Sheet

This question paper consists of15 printed pages.

St. Margarets Secondary School

Mid - Year Examinations 2012

CHEMISTRY 5072/01

READ THESE INSTRUCTIONS FIRST

Write in soft pencil.Do not use staples, paper clips, highlighters, glue or correction fluid.

Write your name, index number on the Answer Sheet in the spaces provided unless this hasbeen done for you.

There are forty questions on this paper. Answerall questions. For each question there are fourpossible answers A, B, C and D.Choose the one you consider correct and record your choice in soft pencil on the separate

Answer Sheet.

Read the instructions on the Answer Sheet very carefully.

Each correct answer will score one mark. A mark will not be deducted for a wrong answer.

Any rough working should be done in this booklet.A copy of the Data Sheet is printed on page 14.A copy of the Periodic Table is printed on page 15.


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1 In a volumetric experiment, hydrochloric acid is added to 25.0 cm3 of aqueoussodium hydroxide.Which piece of apparatus could be used to determine the end-point of the reaction?

A stop-watch

B thermometer

C measuring cylinder

D electronic balance

2 A mixture of two liquids, trichloromethane and water, is separated using aseparating funnel.What could be concluded from this observation?

A Trichloromethane has a boiling point lower than 100 oC.

B Trichloromethane has a lower density than water.

C Trichloromethane and water do not mix.

D Trichloromethane is a volatile liquid.

3 A mixture of two liquids is separated using the set-up shown below.

How many errors are there in this set-up?

A 0

B 1

C 2

D 3

thermometer

water out

condenser

a mixture of

two li uids

anti-bumping

granules

receiver

water in


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4 The chromatogram below shows the dyes contained in four different food colourings(W, X,Y and Z) and two harmful dyes (P and Q).

W X Y Z P Q

Which food colourings are harmful?

A W and X

B X andY

C Y and Z

D X and Z

5 Which of the following mixtures can be separated by adding water, stirring andfiltering?

A sodium carbonate and zinc nitrate

B magnesium and copper

C lead (II) sulfate and barium chloride

D calcium chloride and iron (II) sulfate

6 Which of the following methods could be used to obtain the elements in the

compound magnesium chloride?

A filtration

B distillation

C sublimation

D electrolysis


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7 A beaker containing gasY is inverted over a porous pot containing gas X as shownin the diagram below.

The liquid level in the U-tube did not fall.Which of the following pairs of gases could be X andY?

X Y

A CO NO2

B NO C2H6

C CO2 NH3

D O2 H2

8 The diagram below shows the arrangement of particles in the same substance atdifferent temperatures.

Which of the following could be the melting and boiling points of the substance?

melting point/oC boiling point/oC

A -50 -10

B -10 0

C 0 50

D 20 80

at 10OC at 60

oC


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9 Neon occurs naturally as two isotopes,

Ne and

Ne. The relative atomic mass

of neon is 20.2.

What is the relative abundance of

Ne?

A 20%B 40%

C 60%

D 90%

10 Which of the following pairs of particles have the same number of electrons?

A Na+ and He

B F- and Ar

C P- and Cl-

D K+ and O -

11 Astatine is below iodine in the Periodic Table.Which of the following statements correctly describe astatine?

1. It is a diatomic molecule.

2. It is coloured.3. When astatine is added to aqueous potassium iodide, iodine is formed.

A 1 and 3 only

B 1 and 2 only

C 2 and 3 only

D 1, 2 and 3

12 When chlorine gas is bubbled into aqueous sodium bromide, a brown solution isobtained.Which of the following best explains this observation?

A A coloured solution of sodium chloride is formed.

B The chlorine oxidises bromide ion to bromine.

C The bromide is reduced.

D A compound, BrCl, is formed.


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13 Which of the following elements could be sodium?

melting point/oC electrical conductivity at

room conditions

density/gcm-

A 98 good 0.97

B 113 poor 2.07

C 1083 good 8.92

D 1535 good 7.86

14 An element X with proton number 20 reacts with an elementY with proton number17.Which of the following describes the compound formed?

A a covalent compound of formula XY2

B a covalent compound of formula X2Y

C an ionic compound of formula XY2

D an ionic compound of formula X2Y

15 Element X is a gas at room conditions. It reacts with magnesium to form a whitesolid with the chemical formula Mg3X2.Which of the following could be the electron structure ofX?

A 2.3

B 2.5

C 2.8.3

D 2.8.5

16 Which of the following substances could be hydrogen chloride?

substance melting point boiling point electrical conductivityin liquid state in aqueous state

A low low none none

B low low none good

C high high none none

D high high good good


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17 Which of the following substances contains manganese in its highest oxidationstate?

A Mn

B MnO

C MnO2D KMnO4

18 What is the chemical formula of uranium (VI) oxide?

A U6O

B UO3

C U2O3

D UO6

19 Which of the following is the most appropriate method for making copper (II)sulfate?

A adding copper to aqueous zinc sulfate

B adding copper (II) carbonate to aqueous potassium chloride

C adding copper to dilute sulfuric acid

D adding copper (II) oxide to dilute sulfuric acid

20 Which of the following solutions, when mixed, would produce a precipitate?

A aqueous copper (II) chloride and aqueous sodium hydroxide

B aqueous sodium hydroxide and ethanoic acid

C aqueous sodium nitrate and aqueous magnesium chloride

D aqueous chlorine and aqueous iron (II) chloride

21 Which of the following compounds in an insoluble base?

A potassium oxide

B zinc hydroxide

C sodium hydroxide

D calcium sulfate


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22 When hydrochloric acid reacts with substance X, only a colourless solution isformed.Which could be substance X?

A iron (II) hydroxide

B zinc carbonate

C lead (II) nitrate

D magnesium hydroxide

23 Solution S is gently heated with some aqueous sodium hydroxide. No precipitate orgas is formed. When a piece of aluminium foil is added to the hot solution, a moistred litmus paper turns blue.Which of the following could be in solution S?

A ammonium chloride

B ammonium nitrate

C aluminium chloride

D potassium nitrate

24 A sample of air forms a white precipitate in limewater and turns acidifiedpotassium dichromate (VI) green.Which pairs of gases could be in the air sample?

A carbon dioxide and nitrogen dioxide

B sulfur dioxide ad chlorine

C carbon dioxide and sulfur dioxide

D carbon monoxide and sulfur trioxide

25 Which of the following statements correctly describes one mole of water and one

mole of ammonia at room temperature and pressure?

A They have the same volume.

B They have the same number of atoms.

C They have the same number of molecules.

D They have the same molar mass.


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26 If 10 g of neon contain Xatoms, how many atoms would there be in 7 g of carbonmonoxide?

A 0.25X

B 0.5X

C X

D 1.5X

27 Methane reacts with steam according to the equation below.

CH4(g) + H2O(g) CO(g) + 3H2(g)

What would be the total volume of products formed, at room temperature andpressure, when 100 cm3 of methane reacts with excess steam?

A 100 cm3

B 300 cm

C 400 cm

D 500 cm3

28 A solution contains a mixture of zinc chloride and zinc nitrate in water. Theconcentration of zinc ions and chloride ions are 0.80 mol/dm3 and 0.30 mol/dm3respectively.What is the concentration of the nitrate ions?

A 0.50 mol/dm3

B 0.65 mol/dm3

C 1.00 mol/dm

D 1.30 mol/dm3

29 Which of the following compounds may be reduced by heating with carbon?

A magnesium oxide

B zinc oxide

C calcium carbonate

D sodium oxide


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30 In the extraction of iron, four substances are added into the blast furnace. Three ofthese substances are coke, iron ore and hot air.What is the fourth substance?

A carbon monoxide

B calcium carbonate

C silicon dioxide

D calcium silicate

31 In the graph, curve X shows the results of the reaction between 2 g of zinc granulesin excess hydrochloric acid at 30 oC.

Which changes will produce curveY?

A using 2 g of zinc powder at 30 oC

B using 1 g of zinc granules at 25 oC

C using 1 g of zinc granules at 40 oC

D using 1 g of zinc granules at 30 oC

32 Magnesium reacts with dilute hydrochloric acid.Which solution would give the fastest initial rate of reaction?

A 40 g of HClin 1 000 cm of water

B 20 g of HClin 500 cm of water

C 10 g of HClin 100 cm of water

D 4 g of HClin 50 cm of water


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33 In which reaction is the pressure least likely to affect the rate of the reaction?

A 2CO + O2 2CO2

B 2SO2 + O2 2SO3

C N2 + 3H2 2NH3D 3NaOH + Al(NO3)3 3NaNO3 + Al(OH)3

34 The equations for three reactions are given below.

reaction 1 H2 2H

reaction 2 HCl H + Cl

reaction 3 2H + O H2O

Which of the above reactions are endothermic?

A reactions 1 and 2 only

B reactions 1 and 3 only

C reactions 2 and 3 only

D reactions 1, 2 and 3

35 The equation describes the reaction between methane and chlorine.

CH4 + 4Cl2 CCl4 + 4HCl H = -460 kJ

Some bonds and bond energies are given below.

bond C H Cl Cl H Cl

bond energy (kJ/mol) 412 242 431

What is the bond energy of C Clbond?

A 108 kJ/mol

B 338 kJ/mol

C 432 kJ/mol

D 1352 kJ/mol


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36 Which of the following processes is exothermic?

A dissolving of ammonium chloride in water

B photosynthesis in plants to produce starch

C melting of ice

D combustion of hydrogen to form water

37 Which of the following conducts electricity by the movement of ions?

A copper

B sulfur

C sodium chloride

D graphite

38 Which ions are present in aqueous iron (II) chloride?

A Fe and Cl2

B Fe+ , Cl- and H2

C Fe+, Cl-, H+ and OH-

D Fe+, H+, Cl2

-, and O -

39 The diagram shows the set-up of the electrolysis of aqueous copper (II) sulfateusing carbon electrodes.

Which of the following will occur?

A Copper is plated on the cathode.

B Copper is plated on the anode.

C Oxygen gas is produced at the cathode.D Hydrogen is produced at the anode.

carbon electrodes

aqueous copper (II) sulfate


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40 Sodium metal is obtained industrially from the electrolysis of molten sodiumchloride. The other product obtained is chlorine gas.What volume of chlorine gas, measured at room temperature and pressure, wouldbe obtained if 230 g of sodium metal is formed in the electrolysis?

A 60 dm

B 120 dm3

C 240 dm

D 480 dm3


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DATA SHEET

Colours of some common metal hydroxides

aluminium hydroxide white

calcium hydroxide white

copper (II) hydroxide light blue

iron (II) hydroxide green

iron (III) hydroxide red-brown

lead (II) hydroxide white

zinc hydroxide white


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