CHEMISTRY 2017 Byju’s Classes | 7.5 lakh+ likes on . India’s most liked Education Company | Contact: 9900012400 KCET CHEMISTRY (2017) 1. When the pure solvent diffuses out of the solution through the semi – permeable membrane then the process is called (a) Dialysis (b) Osmosis (c) Sorption (d) Reverse Osmosis 2. Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons? (a) Trigonal Planar (b) Octahedral (c) Pyramidal (d) Tetrahedral 3. For a reaction 1 2 → 2 rate of disappearance of A is related to rate of appearance of B by the expression. (a) −[] =4 +[] (b) −[] = 1 2 +[] (c) −[] = 1 4 +[] (d) −[] = +[] 4. The correct statement regarding defect in solids is (a) Schottky defect has no effect on the physical properties of solids. (b) Frenkel defect is usually favoured by a very small difference in the sizes of cations and anions. (c) Trapping of proton in the lattice leads to the formation of F – centers. (d) Frenkel defect is a dislocation defect. 5. Which one of the following noble gas has an unusual property of diffusing through the materials such as rubber, glass or plastic? (a) Ne (b) Kr (c) Ar (d) He 6. Lower members of aliphatic carboxylic acid are soluble in water. This is due to (a) Water is non electrolyte (b) Due to London forces (c) Van der – Waals interaction with water molecules. (d) Formation of hydrogen bonds with water. 7. Select wrong chemical reaction among the following: (a) 8 3 + 3 2 → 6 4 + 2 (b) 2 + 4 → 2 + 2 + 2 2 (c) 2 + 2 → 2 + 2 + 2 (d) 2() 2 + 2 2 → () 2 + 2 + 2 2
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CHEMISTRY 2017
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KCET CHEMISTRY (2017) 1. When the pure solvent diffuses out of the solution through the semi – permeable membrane then the process
is called (a) Dialysis (b) Osmosis (c) Sorption (d) Reverse Osmosis 2. Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of
→ 2𝐵 rate of disappearance of A is related to rate of appearance of B by the
expression.
(a) −𝑑[𝐴]
𝑑𝑡= 4
+𝑑[𝐵]
𝑑𝑡 (b)
−𝑑[𝐴]
𝑑𝑡=1
2 +𝑑[𝐵]
𝑑𝑡
(c) −𝑑[𝐴]
𝑑𝑡=1
4
+𝑑[𝐵]
𝑑𝑡 (d)
−𝑑[𝐴]
𝑑𝑡=+𝑑[𝐵]
𝑑𝑡
4. The correct statement regarding defect in solids is (a) Schottky defect has no effect on the physical properties of solids. (b) Frenkel defect is usually favoured by a very small difference in the sizes of cations and anions. (c) Trapping of proton in the lattice leads to the formation of F – centers. (d) Frenkel defect is a dislocation defect. 5. Which one of the following noble gas has an unusual property of diffusing through the materials such as
rubber, glass or plastic? (a) Ne (b) Kr (c) Ar (d) He 6. Lower members of aliphatic carboxylic acid are soluble in water. This is due to (a) Water is non electrolyte (b) Due to London forces (c) Van der – Waals interaction with water molecules. (d) Formation of hydrogen bonds with water. 7. Select wrong chemical reaction among the following: (a) 8𝑁𝐻3 + 3𝐶𝑙2
→ 6𝑁𝐻4𝐶𝑙 +𝑁2
(b) 𝑀𝑛𝑂2+ 4𝐻𝐶𝑙 → 𝑀𝑛𝐶𝑙2+ 𝐶𝑙2+2𝐻2𝑂
(c) 2𝑁𝑎𝑂𝐻 +𝐶𝑙2 → 2𝑁𝑎𝐶𝑙 +𝐻2 +𝑂2
(d) 2𝐶𝑎(𝑂𝐻)2 +2𝐶𝑙2 → 𝐶𝑎(𝑂𝐶𝑙)2 +𝐶𝑎𝐶𝑙2+2𝐻2𝑂
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8. In the electrolysis of aqueous sodium chloride solution, which of the half cell reaction will occur at anode? (a) 2𝐻2𝑂(𝑙)
→ 𝑂2 + 4𝐻
++ 4𝑒−
𝐸𝑐𝑒𝑙𝑙0 = 1.23 𝑣𝑜𝑙𝑡𝑠
(b) 𝑁𝑎(𝑎𝑞)
+ +𝑒− → 𝑁𝑎(𝑠)
𝐸0 = −2.71 𝑣𝑜𝑙𝑡𝑠
(c) 𝐶𝑙(𝑎𝑞)−
→
1
2𝐶𝑙2+ 𝑒
−
𝐸𝑐𝑒𝑙𝑙0 = 1.36 𝑣𝑜𝑙𝑡𝑠
(d) 𝐻(𝑎𝑞)+ + 𝑒−
→
1
2𝐻2
𝐸𝑐𝑒𝑙𝑙0 = 0.00 𝑣𝑜𝑙𝑡𝑠
9. Square planar complex of the type MAXBL (where A, B, X and L are unidentate ligands) shows following set of
isomers. (a) Two cis and one trans (b) Two trans and one cis (c) Two cis and two trans (d) Three cis and one trans 10. The monomer used in Novolac, a polymer used in paints (a) Butadiene and Styrene (b) Butadiene and Acrylo Nitrile (c) Phenol and Formaldehyde (d) Melamine and Formaldehyde 11. The correct set of quantum number for the unpaired electrons of chlorine atom is (a) 3, 1, 1, ± ½ (b) 2, 1, -1, + ½ (c) 3, 0, 0, ± ½ (d) 2, 0, 0, + ½ 12. Which of the following aqueous solutions has highest freezing point? (a) 0.1 molal AL2(SO4)3 (b) 0.1 molal BaCl2 (c) 0.1 molal AlCl3 (d) 0.4 molal NH4Cl 13. The reaction quotient ‘Qc’ is useful in predicting the direction of the reaction. Which of the following is
incorrect? (a) If Qc = Kc, no reaction occur (b) If Qc < Kc, the forward reaction is favoured (c) If Qc > Kc, the reverse reaction is favoured (d) If Qc > Kc, forward reaction is favoured 14. The correct order of increasing basic nature for the bases NH3, CH3NH2 and (CH3)2NH in aqueous solutions. (a) NH3 < CH3NH2 < (CH3)2NH (b) (CH3)2NH < NH3 < CH3NH2 (c) CH3NH2 < NH3 < (CH3)2NH (d) CH3NH2 < (CH3)2NH < NH3 15. Cannizzaro’s reaction is an example of auto oxidation (a) It is a reaction answered only by aromatic aldehydes (b) It is a reaction answered by only aldehydes containing α – hydrogen. (c) It is a typical reaction of aliphatic aldehyde. (d) It is a reaction answered by all aldehydes.
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16. In a face centred cubic arrangement of A and B atoms in which ‘A’ atoms are at the corners of the unit cell and
‘B’ atoms are at the face centers. One of the ‘A’ atom is missing from one corner in unit cell. The simplest formula of compound is
(a) A7B24 (b) A7B3 (c) A7B8 (d) AB3 17. Pick the wrong statement from the following : (a) Sources of Vitamin B1 are yeast, milk, green vegetables and cereals (b) Deficiency of Vitamin D causes xerophthalmia (c) Deficiency of Vitamin B, (pyridoxime) results in convulsions. (d) Consumption of citrus fruits and green leafy vegetables in food prevents scurvy 18. Addition of mineral acid to an aqueous solution of Borax, the following compound is formed (a) Pyroboric acid (b) Orthoboric acid (c) Boron hydride (d) Meta boric acid 19. Identify the correct statement in the following : (a) Propan – 1 – ol and propan – 2 – ol are position isomers. (b) Dimethyl ether and ethanol are chain isomers (c) n – butane and isobutene are functional isomers (d) Ethanoic acid and methyl methanoate are position isomers 20. Bacterial antibiotics among the following is (a) Chloramphenicol (b) Ofloxacin (c) Tetracycline (d) Erythromycin 21. The process which is responsible for the formation of delta at a place where rivers meets the sea is (a) Coagulation (b) Colloid formation (c) Peptization (d) Emulsification 22. The electronegativities of C, N, Si and P are in the order of (a) P < Si < N < C (b) Si < P < N < C (c) P < Si < C < N (d) Si < P < C < N 23. Gabriel phthalimide synthesis is used in the preparation of primary amine from phthalimide, which of the
following reagent is not used during the process? (a) Alkyl Halides (b) KOH (c) HCl (d) NaOH 24. The equilibrium constant for the reaction N2(g) + O2(g) ⇌ 2NO(g) is 4 x 10-4 at 2000 K. In presence of a catalyst
the equilibrium is attained ten times faster. Therefore the equilibrium constant in presence of catalyst of 2000 K is
(a) 4 x 10-3 (b) 40 x 10-4 (c) 4 x 10-2 (d) 4 x 10-4
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25. Which of the following statement is wrong regarding lanthonoids? (a) The ionic size of Ln(III) ions decreases with increasing atomic number. (b) Ln(III) compounds are generally colourless. (c) Ln(III) compounds are predominantly ionic in character . (d) Ln(III) hydroxides are mainly basic in nature. 26. Which of the following is not a biodegradable polymer? (a) Polyhydroxy butyrate – CO – β hydroxyl valerate. (b) Glyptol (c) Nylon 2 – Nylon – 6 (d) pHBV 27. For the preparation of Alkanes, aqueous solution of sodium or potassium salt of carboxylic acid is subjected to (a) Oxidation (b) Electrolysis (c) Hydrogenation (d) Hydrolysis 28. In which of the following, hemolytic bond fission takes place? (a) Free radical chlorination of methane (b) Addition of HBr to double bond (c) Nitration of Benzene (d) Alkaline hydrolysis of ethyl chloride 29. In the manufacture of hydrogen from water gas (CO + H2), which of the following is correct statement? (a) CO is oxidized to CO2 with steam in the presence of a catalyst followed by absorption of CO2 in alkali. (b) Hydrogen is isolated by diffusion. (c) H2 is removed by occlusion with pd. (d) CO and H2 are separated based on difference in their densities. 30. Plaster of Paris is represented as (a) CaSO4. ½ H2O (b) CaSO4 (c) CaSO4. H2O (d) CaSO4. 2H2O 31. The Vant Hoff’s factor ‘I’ accounts for (a) extent of mobility of solute (b) extent of dissolution of solute (c) extent of solubility of solute (d) extent of dissociation of solute. 32. A reaction has both ∆H and ∆S –ve. The rate of reaction (a) remains unaffected by change in temperature (b) increases with increase in temperature (c) cannot be predicted for change in temperature (d) increases with decrease in temperature. 33. The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration
of transition elements which shows highest magnetic moment? (a) 3d7 (b) 3d5 (c) 3d8 (d) 3d2
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34. In the following sequence of reactions
𝐶𝐻3𝐵𝑟 𝐾𝐶𝑁→ 𝐴
𝐻3𝑂+
→
𝐵 𝐿𝑖𝐴𝑙𝐻4→ 𝐶
The end product is (a) methane (b) ethyl Alcohol (c) Acetadehyde (d) Acetone 35. The pressure of real gases is less than that of ideal gas because of (a) Intermolecular attraction (b) Increase in the kinetic energy of the molecules (c) Increase in the number of collisions. (d) Finite size of particles 36. Which of the following order is true regarding the acidic nature of phenol? (a) O – cresol < phenol < O – nitrophenol (b) phenol < O – cresol < O – nitrophenol (c) phenol < O – cresol < O – nitrophenol (d) Phenol < O – cresol < O – nitrophenol 37. Which of the following statement is in accordance with the Arrhenius equation? (a) Rate constant decreases exponentially with increase in temperature. (b) Rate of a reaction increases with decrease in activation energy. (c) Rate of a reaction increases with increase in temperature. (d) Rate of reaction does not change with increase in activation energy. 38. Which one of the following metallic oxide exhibit amphoteric nature? (a) CaO (b) BaO (c) Na2O (d) Al2O3 39. Toluene reacts with halogen in presence of Iron (III) chloride giving ortho and para halo compounds. The
reaction is (a) Electrophilic substitution reaction (b) Nucleophilic substitution reaction (c) Electrophilic elimination reaction (d) Free radical addition reaction 40. Hormones are secreated by ductless glands of human body. Iodine containing hormone is (a) Testostrone (b) Thyroxine (c) Adrenoline (d) Insulin 41. Which of the following crystal has unit cell such that a ≠ b ≠ c and α ≠ β ≠ γ ≠ 900 ? (a) K2SO4 (b) NaNO3 (c) KNO3 (d) K2Cr2O7 42. If 3.01 × 1020 molecules are removed from 98 mg of H2SO4, then number of moles of H2SO4 left are (a) 0.1 × 10-3 mol (b) 0.5 × 10-3 mol (c) 9.95 × 10-2 mol (d) 1.66 × 10-3 mol
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43. The metal extracted by leaching with a cyanide is (a) Cu (b)Ag (c) Al (d) Na 44. Which of the following reagent cannot be used to oxidize primary alcohols to aldehydes ? (a) Heating in presence of Cu at 573 K (b) KMnO4 in acidic medium (c) CrO3 in anhydrous medium (d) Pyridinium chloro chromate 45. Which of the following statement is incorrect ? (a) Complex reactions have fractional order. (b) Molecularity is only applicable for elementary reaction. (c) The rate law for any reaction cannot be determined experimentally (d) Biomolecular reactions involve simultaneous collision between tow species 46. According to crystal field theory, the M – L bond in a complex is (a) Purely covalent (b) Purely ionic (c) Partially covalent (d) Purely co-ordinate 47. Which of the following element forms pπ - pπ bond with itself ? (a) Te (b) P (c) Se (d) N 48. By passing electric current, NaClO3 is converted into NaClO4 according to the following equation NaClO3 + H2O
→ NaClO4 + H2 How many moles of NaClO4 will be formed when three Faradays of charge is passed through NaClO3 ?
(a) 1.0 (b) 3.0 (c) 1.5 (d) 0.75 49. The product formed during the following reaction are
50. Hydrogenation of vegetable oils in presence of finely divided Nickel as catalyst. The reaction is
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(aq) → ClO- + 2Cl- is an example of (a) Oxidation reaction (b) Reduction reaction (c) Disproportionation reaction (d) Decomposition reaction 52. The co-ordination number and the oxidation state of the element ‘M’ in the complex [M(en) 2 (C2O4)]NO2
{where (en) is ethan-1, 2 - diamine} are respectively (a) 4 and 3 (b) 4 and 2 (c) 6 and 3 (d) 6 and 2 53. Pick the correct statement among the following : (a) Sodium lauryl sulphate forms an insoluble scum with hard water (b) Non-ionic detergents is formed when polyethylene glycol reacts with adipic acid (c) Sodium dodecyl benzene sulphonate used in tooth paste is a cationic detergent. (d) Cetyl trimethyl ammonium bromide is a popular cationic detergent used in air conditioner 54. Which of the following is not a favourable condition for physical adsorption ? (a) Higher critical temperature of adsorbate (b) Low temperature (c) High temperature (d) High pressure 55. Reduction of ketones cannot be carried out with which of the following reagents ? (a) Hydrogen in presence of palladium in Barium sulphate and quinolone (b) Zinc amalgam and concentrated HCl (c) Sodium borohydride or Lithium Aluminim hydride (d) Hydrazine and KOH in ethylene glycol 56. The standard reduction potential at 298 K for the following half cell reaction 𝑍𝑛𝑎𝑞
2+ +2𝑒 → 𝑍𝑛(𝑠)𝐸0 = −0.762 𝑉
𝐶𝑟(𝑎𝑞)3+ +3𝑒 → 𝐶𝑟(𝑠)𝐸
0 = 0.740 𝑉
2𝐻(𝑎𝑞)+ +2𝑒 → 𝐻2(𝑔) 𝐸
0 = 0.0 𝑉
𝐹2(𝑔)+ 2𝑒 → 2𝐹(𝑎𝑞)− 𝐸0 = 2.87 𝑉
Which of the following is strongest reducing agent ? (a) H2(g) (b) Cr(s) (c) F2(g) (d) Zn(s) 57. Which of the following is the correct electron dot structure of N 2O molecule ?
(a) : �̈� −𝑁 = �̈�: (b)
(c) : 𝑁 = 𝑁 = �̈�: (d)
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58. Extraction of chlorine from brine solution is based on (a) Reduction (b) Chlorination (c) Oxidation (d) Acidification 59. Which one of the following is not a common component of photo-chemical smog ? (a) Ozone (b) Acrolein (c) Peroxy acetyl nitrate (d) Peroxy flouro carbons 60. The Glycosidic linkagage present in sucrose is between (a) C – 1 of β – galactose and C – 4 of α – glucose (b) C – 1 of α – glucose and C – 2 of β – fructose (c) C – 1 of α – glucose and C – 4 of β – fructose (d) C – 1 of α – glucose and C – 4 of α - glucose
ANSWER KEY:
1. d 2. c 3. c 4. d 5. d 6. d 7. c 8. c 9. a 10. c
11. a 12. d 13. d 14. a 15. a 16. a 17. b 18. b 19. a 20. b 21. a 22. d 23. c 24. d 25. b 26. b 27. b 28. a 29. a 30. a
31. d 32. b 33. b 34. b 35. a 36. a 37. c 38. d 39. a 40. b 41. d 42. b 43. b 44. b 45. a 46. b 47. d 48. c 49. a 50. b
51. b 52. c 53. a 54. c 55. a 56. d 57. d 58. c 59. a 60. b SOLUTIONS: 1. (d) Conceptual 2. (c) 3 based pairs + 1 love pair = Triangle Pyramidal
8. (c) 𝐶�̅� ions are oxidised to give 𝐶𝑙2 9. (a) Conceptual
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10. (c) Phenol, formaldehyde give Novalac
11. (a) Cl → 3s2 3p5
↿⇂ ↿⇂ ↿
n = 3, l = 1, m = 1, s = ± 1
2
12. (d) Solution with lower value of i.m will have high f.pt 13. (d) Conceptual 14. (a) basic nature order 2° > 1° > NH3 15. (a) Aromatic aldehydes donot cartain ∝ −hydrogen respond for Cannizaro’s reaction
16. (a) Atoms of A = 7 × 1
8= 7/8
Atoms of B = 6 × 1
2= 3
Emperical formula = 𝐴7𝐵24
17. (b) Conceptual
18. (b) 𝑁𝑎2𝐵4𝑂7 ∙ 10𝐻2𝑂 𝐻𝐶𝐿 → 𝐻2𝐵4𝑂7 which on hydrolysis gives Ortho Boric acid
23. (c) Pthalimide, base, 1° R – X are used 24. (d) 𝐾𝑐 is not effected by addition of catalyst 25. (b) Ln(III) compounds are coloured also 26. (b) Conceptual
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50. (b) Conceptual 51. (b)
3ClO⊝ ⟶ CIO⊝ + CI⊝
𝑥 = +1 𝑥 = −1 52. (c) Conceptual 53. (a) Conceptual 54. (c) Physical adsorption is weak and decreases with rise in temperature 55. (a) Conceptual 56. (d) Due to high –Ve SRP value 57. (d) Conceptual
