CHEMISTRY- PAGE 12
1. The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is :
1) 2
2) 3
3) 4
4) 1
Ans: 1
2. Which one of the following orders is not in accordance with the property stated against it?
1) F 2 > Cl2 > Br2 > I2 : Oxidising power
2) HI > HBr > HCl > HF : Acidic property in water
3) F 2 > Cl2 > Br2 > I2 : Electronegativity
4) F 2 > Cl2 > Br2 > I2 : Bond dissociation energy
Ans: 4
3. Which of the following is not isostructural with SiCl4 ?
1) SCl4 2) SO2-4 3) PO3-4 4) NH+4
Ans: 1
4. Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?
(a) Methyl isocyanide (b) Acetamide (c) Methyl cyanide (d) Nitroethane.
Ans: A
5. RNA and DNA are chiral molecules, their chirality is due to
(a) chiral bases (b) chiral phosphate ester units (c) D-sugar component (d) L-sugar component.
Ans: C
6. The Langmuir adsorption isotherm is deduced using the assumption
(a) the adsorption sites are equivalent in their ability to adsorb the particles
(b) the heat of adsorption varies with coverage
(c) the adsorbed molecules interact with each other
(d) the adsorption takes place in multilayers.
Ans: A
7. Which of the following oxidation states are the most characteristic for lead and tin respectively?
(a) + 2, + 4 (b) + 4, + 4 (c) + 2, + 2 (d) + 4, + 2
Ans: A
8. Which one of the following elements occur in highest abundance from Lithosphere?
(A) Radium (B) Barium (C) Strontium (D) Beryllium
Ans: B
9. Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
(a) Cope reduction
(b) Dow reduction
(c) Wolf-Kishner reduction
(d) Clemmensen redcution.
Ans: D
10. Which of the following represents the correct order of the acidity in the given compounds?
(a) FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
(b) BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH
(c) FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
(d) CH3 COOH > BrCH2COOH > ClCH2COOH > FCH2COOH
Ans: C
11. If there is no rotation of plane polarised light by a compound in a specific solvent, though to be chiral, it may mean that
(a) the compound is certainly meso
(b) there is no compound in the solvent
(c) the compound may be a racemic mixture
(d) the compound is certainly a chiral.
Ans: A
12. Which of the following is water-soluble?
(a) Vitamin E
(b) Vitamin K
(c) Vitamin A
(d) Vitamin B
Ans: D
13. The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be :
1) 144 torr
2) 288 torr
3) 14 torr
4) 72 torr
Ans: 4
14. For a first order reaction A → B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 x 10-5 mol L-1 s-1. The half life period of the reaction is :
1) 227 s
2) 327 s
3) 527 s
4) 347 s
Ans: 4
15. Which of the following is the electron deficient molecule ?
1) B2H6
2) C2H6
3) PH3
4) SiH4
Ans: 1
16. A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three α- particles in succession. The group of the periodic table to which the resulting daughter element would belong is :
1) Group 14
2) Group 16
3) Group 4
4) Group 6
Ans: 1
17. The surface tension of which of the following liquid is maximum ?
1) H2O
2) C6H6
3) CH3OH
4) C2H5OH
Ans: 1
18. Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?
1) Exothermic and decreasing disorder
2) Endothermic and increasing disorder
3) Exothermic and increasing disorder
4) Endothermic and decreasing disorder
Ans: 3
19. Which one of the following forms micelles in aqueous solution above certain concentration ?
1) Urea
2) Dodecyl trimethyl ammonium chloride
3) Pyridinium chloride
4) Glucose
Ans: 2
20. Electrolytic reduction of nitrobenzene weakly acidic medium gives :
1) aniline
2) nitrosobenzene
3) N-phenylhydroxylamine
4) p-hydroxyaniline
Ans: 3
21. Which of the following would have a permanent dipole moment ?
1) BF 3
2) SiF 4
3) SF 4
4) XeF 4
Ans: 3
22. Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
1) Benzyl chloride
2) Ethyl chlorcide
3) Chlorobenzene
4) Isopropyl chloride
Ans: 1
23. The rate of reaction between two reactants A and B decreases by a factor of 4, if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is :
1) -1
2) -2
3) 1
4) 2
Ans: 2
24. In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells ?
1) 8
2) 4
3) 2
4) 6
Ans: 4
25. What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1), sodium sulphide (pH2), sodium selenide (pH3) and sodium telluride (pH4) ?
1) pH1 > pH2 ≈ pH3 > pH4
2) pH1 < pH2 < pH3 < pH4
3) pH1 < pH2 < pH3 ≈ pH4
4) pH1 > pH2 > pH3 > pH4
Ans: 4
26. Which functional group participates in disulphide bond formation in proteins ?
1) Thiolactone
2) Thiol
3) Thioether
4) Thioester
Ans: 2
27. White metal is the combination of _________ elements.
(A) Lithium + aluminium
(B) Lithium + lead
(C) Lithium + magnesium
(D) Lithium + copper
Ans: B
28. H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because :
1) presence of HCl decreases the sulphide ion concentration
2) presence of HCl increases the sulphide ion concentration
3) solubility product of group II sulphides is more than that of group IV sulphides
4) sulphides of group IV cations are unstable in HCl
Ans: 1
29. Which one of the following oxides is expected to exhibit paramagnetic behaviour ?
1) CO2 2) SO2 3) ClO2 4) SiO2
Ans: 3
30. Ethlyne diamine triacetate ____ ligand.
(A) Tridentate (B) Tetradentate (C) Pentadentate (D) Hexadentate
Ans: C
31. According to diagonal relationship the properties of Lithium is similar to ________.
(A) Magnesium (B) Beryllium (C) Potassium (D) Sodium
Ans: A
32. The correct order of acid strength is :
1) HClO < HClO2 < HClO3 < HClO4
2) HClO4 < HClO < HClO2 < HClO3
3) HClO2 < HClO3 < HClO4 < HClO
4) HClO4 < HClO3 < HClO2 < HClO
Ans: 1
33. The main reason for larger number of oxidation states exhibited by the actinides than the corresponding lanthanides, is :
1) lesser energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
2) larger atomic size of actinides than the lanthanides
3) more energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
4) greater reactive nature of the actinides than the lanthanides
Ans: 1
34. Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?
1) Cl < F < S < O
2) O < S < F < Cl
3) S < O < Cl < F
4) F < Cl < O < S
Ans: 2
35. A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at 20°C are 440 mm of Hg for pentane and 120 mm of Hg for hexane. The mole fraction of pentane in the vapour phase would be :
1) 0.178
2) 0.278
3) 0.378
4) 0.478
Ans: 4
36. 4.5g of aluminium (at. mass 27 amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be :
1) 22.4 L
2) 32.8 L
3) 5.6 L
4) 11.2 L
Ans: 3
37. The best method for the separation of naphthalene and benzoic acid from their mixture is :
1) chromatography
2) crystallisation
3) distillation
4) sublimation
Ans: 4
38. The mole fraction of the solute in one molal aqueous solution is :
1) 0.054
2) 0.042
3) 0.018
4) 0.009
Ans: 3
39. Identify the correct statement for change of Gibbs energy for a system (∆Gsystem) at constant temperature and pressure :
1) If ∆Gsystem > 0, the process is spontaneous
2) If ∆Gsystem = 0, the system has attained equilibrium
3) If ∆Gsystem = 0, the system is still moving in a particular direction
4) If ∆Gsystem < 0, the process is not spontaneous
Ans: 2
40. Arrange the following compounds in the order of electronegativity Li, Mg, C, Cu.
(A) Li > Mg > Cu > C
(B) Li < Mg < C < Cu
(C) Li < Mg < C = Cu
(D) Li < Mg < Cu < C
Ans: D
41. A plot of log x/m versus log p for the adsorption of a gas on a solid gives a straight line with slope equal to :
1) - log k 2) n 3) 1/n 4) log k
Ans: 3
42. The resultant spin quantum number for quartet carbyne will be
(A) 0
(B) 1/2
(C) 1
(D) 3/2
Ans: D
43. The human body does not produce :
1) DNA 2) vitamins 3) hormones 4) enzymes
Ans: 2
44. Which one of the following theory is not related to acid-base concept ?
(A) Bronsted (B) Arrhenius (C) Pauling (D) Lewis
Ans: C
45. More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is :
1) more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
2) lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
3) greater metallic character of the lanthanoids than that of the corresponding actinoids
4) more active nature of the actinoids
Ans: 2
46. A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is :
1) acetaldehyde 2) acetone 3) diethyl ketone 4) formaldehyde
Ans: 1
47. Which one of the following is a peptide hormone ?
1) Glucagon 2) Testosterone 3) Thyroxin 4) Adrenaline
Ans: 1
48. Which one of the following elements has the highest electronegativity on the basis of Pauling scale?
(A) Thallium (B) Iridium (C) Gallium (D) Aluminium
Ans: A
49. Which compound is formed when borex is dissolved in water?
(A) Orthoboric acid (B) Metaboric acid (C) Sodium metaborate (D) Borax bead
Ans: A
50. Which one of the following oxidation state is not possible for 16th group element?
(A) +2 (B) –2 (C) +4 (D) +3
Ans: D
1) 2
2) 3
3) 4
4) 1
Ans: 1
2. Which one of the following orders is not in accordance with the property stated against it?
1) F 2 > Cl2 > Br2 > I2 : Oxidising power
2) HI > HBr > HCl > HF : Acidic property in water
3) F 2 > Cl2 > Br2 > I2 : Electronegativity
4) F 2 > Cl2 > Br2 > I2 : Bond dissociation energy
Ans: 4
3. Which of the following is not isostructural with SiCl4 ?
1) SCl4 2) SO2-4 3) PO3-4 4) NH+4
Ans: 1
4. Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?
(a) Methyl isocyanide (b) Acetamide (c) Methyl cyanide (d) Nitroethane.
Ans: A
5. RNA and DNA are chiral molecules, their chirality is due to
(a) chiral bases (b) chiral phosphate ester units (c) D-sugar component (d) L-sugar component.
Ans: C
6. The Langmuir adsorption isotherm is deduced using the assumption
(a) the adsorption sites are equivalent in their ability to adsorb the particles
(b) the heat of adsorption varies with coverage
(c) the adsorbed molecules interact with each other
(d) the adsorption takes place in multilayers.
Ans: A
7. Which of the following oxidation states are the most characteristic for lead and tin respectively?
(a) + 2, + 4 (b) + 4, + 4 (c) + 2, + 2 (d) + 4, + 2
Ans: A
8. Which one of the following elements occur in highest abundance from Lithosphere?
(A) Radium (B) Barium (C) Strontium (D) Beryllium
Ans: B
9. Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
(a) Cope reduction
(b) Dow reduction
(c) Wolf-Kishner reduction
(d) Clemmensen redcution.
Ans: D
10. Which of the following represents the correct order of the acidity in the given compounds?
(a) FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
(b) BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH
(c) FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
(d) CH3 COOH > BrCH2COOH > ClCH2COOH > FCH2COOH
Ans: C
11. If there is no rotation of plane polarised light by a compound in a specific solvent, though to be chiral, it may mean that
(a) the compound is certainly meso
(b) there is no compound in the solvent
(c) the compound may be a racemic mixture
(d) the compound is certainly a chiral.
Ans: A
12. Which of the following is water-soluble?
(a) Vitamin E
(b) Vitamin K
(c) Vitamin A
(d) Vitamin B
Ans: D
13. The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be :
1) 144 torr
2) 288 torr
3) 14 torr
4) 72 torr
Ans: 4
14. For a first order reaction A → B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 x 10-5 mol L-1 s-1. The half life period of the reaction is :
1) 227 s
2) 327 s
3) 527 s
4) 347 s
Ans: 4
15. Which of the following is the electron deficient molecule ?
1) B2H6
2) C2H6
3) PH3
4) SiH4
Ans: 1
16. A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three α- particles in succession. The group of the periodic table to which the resulting daughter element would belong is :
1) Group 14
2) Group 16
3) Group 4
4) Group 6
Ans: 1
17. The surface tension of which of the following liquid is maximum ?
1) H2O
2) C6H6
3) CH3OH
4) C2H5OH
Ans: 1
18. Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?
1) Exothermic and decreasing disorder
2) Endothermic and increasing disorder
3) Exothermic and increasing disorder
4) Endothermic and decreasing disorder
Ans: 3
19. Which one of the following forms micelles in aqueous solution above certain concentration ?
1) Urea
2) Dodecyl trimethyl ammonium chloride
3) Pyridinium chloride
4) Glucose
Ans: 2
20. Electrolytic reduction of nitrobenzene weakly acidic medium gives :
1) aniline
2) nitrosobenzene
3) N-phenylhydroxylamine
4) p-hydroxyaniline
Ans: 3
21. Which of the following would have a permanent dipole moment ?
1) BF 3
2) SiF 4
3) SF 4
4) XeF 4
Ans: 3
22. Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
1) Benzyl chloride
2) Ethyl chlorcide
3) Chlorobenzene
4) Isopropyl chloride
Ans: 1
23. The rate of reaction between two reactants A and B decreases by a factor of 4, if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is :
1) -1
2) -2
3) 1
4) 2
Ans: 2
24. In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells ?
1) 8
2) 4
3) 2
4) 6
Ans: 4
25. What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH1), sodium sulphide (pH2), sodium selenide (pH3) and sodium telluride (pH4) ?
1) pH1 > pH2 ≈ pH3 > pH4
2) pH1 < pH2 < pH3 < pH4
3) pH1 < pH2 < pH3 ≈ pH4
4) pH1 > pH2 > pH3 > pH4
Ans: 4
26. Which functional group participates in disulphide bond formation in proteins ?
1) Thiolactone
2) Thiol
3) Thioether
4) Thioester
Ans: 2
27. White metal is the combination of _________ elements.
(A) Lithium + aluminium
(B) Lithium + lead
(C) Lithium + magnesium
(D) Lithium + copper
Ans: B
28. H2S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because :
1) presence of HCl decreases the sulphide ion concentration
2) presence of HCl increases the sulphide ion concentration
3) solubility product of group II sulphides is more than that of group IV sulphides
4) sulphides of group IV cations are unstable in HCl
Ans: 1
29. Which one of the following oxides is expected to exhibit paramagnetic behaviour ?
1) CO2 2) SO2 3) ClO2 4) SiO2
Ans: 3
30. Ethlyne diamine triacetate ____ ligand.
(A) Tridentate (B) Tetradentate (C) Pentadentate (D) Hexadentate
Ans: C
31. According to diagonal relationship the properties of Lithium is similar to ________.
(A) Magnesium (B) Beryllium (C) Potassium (D) Sodium
Ans: A
32. The correct order of acid strength is :
1) HClO < HClO2 < HClO3 < HClO4
2) HClO4 < HClO < HClO2 < HClO3
3) HClO2 < HClO3 < HClO4 < HClO
4) HClO4 < HClO3 < HClO2 < HClO
Ans: 1
33. The main reason for larger number of oxidation states exhibited by the actinides than the corresponding lanthanides, is :
1) lesser energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
2) larger atomic size of actinides than the lanthanides
3) more energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
4) greater reactive nature of the actinides than the lanthanides
Ans: 1
34. Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?
1) Cl < F < S < O
2) O < S < F < Cl
3) S < O < Cl < F
4) F < Cl < O < S
Ans: 2
35. A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at 20°C are 440 mm of Hg for pentane and 120 mm of Hg for hexane. The mole fraction of pentane in the vapour phase would be :
1) 0.178
2) 0.278
3) 0.378
4) 0.478
Ans: 4
36. 4.5g of aluminium (at. mass 27 amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions in solution by the same quantity of electric charge will be :
1) 22.4 L
2) 32.8 L
3) 5.6 L
4) 11.2 L
Ans: 3
37. The best method for the separation of naphthalene and benzoic acid from their mixture is :
1) chromatography
2) crystallisation
3) distillation
4) sublimation
Ans: 4
38. The mole fraction of the solute in one molal aqueous solution is :
1) 0.054
2) 0.042
3) 0.018
4) 0.009
Ans: 3
39. Identify the correct statement for change of Gibbs energy for a system (∆Gsystem) at constant temperature and pressure :
1) If ∆Gsystem > 0, the process is spontaneous
2) If ∆Gsystem = 0, the system has attained equilibrium
3) If ∆Gsystem = 0, the system is still moving in a particular direction
4) If ∆Gsystem < 0, the process is not spontaneous
Ans: 2
40. Arrange the following compounds in the order of electronegativity Li, Mg, C, Cu.
(A) Li > Mg > Cu > C
(B) Li < Mg < C < Cu
(C) Li < Mg < C = Cu
(D) Li < Mg < Cu < C
Ans: D
41. A plot of log x/m versus log p for the adsorption of a gas on a solid gives a straight line with slope equal to :
1) - log k 2) n 3) 1/n 4) log k
Ans: 3
42. The resultant spin quantum number for quartet carbyne will be
(A) 0
(B) 1/2
(C) 1
(D) 3/2
Ans: D
43. The human body does not produce :
1) DNA 2) vitamins 3) hormones 4) enzymes
Ans: 2
44. Which one of the following theory is not related to acid-base concept ?
(A) Bronsted (B) Arrhenius (C) Pauling (D) Lewis
Ans: C
45. More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is :
1) more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
2) lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
3) greater metallic character of the lanthanoids than that of the corresponding actinoids
4) more active nature of the actinoids
Ans: 2
46. A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is :
1) acetaldehyde 2) acetone 3) diethyl ketone 4) formaldehyde
Ans: 1
47. Which one of the following is a peptide hormone ?
1) Glucagon 2) Testosterone 3) Thyroxin 4) Adrenaline
Ans: 1
48. Which one of the following elements has the highest electronegativity on the basis of Pauling scale?
(A) Thallium (B) Iridium (C) Gallium (D) Aluminium
Ans: A
49. Which compound is formed when borex is dissolved in water?
(A) Orthoboric acid (B) Metaboric acid (C) Sodium metaborate (D) Borax bead
Ans: A
50. Which one of the following oxidation state is not possible for 16th group element?
(A) +2 (B) –2 (C) +4 (D) +3
Ans: D
51. The appearance of colour in solid alkali metal halides is generally due to :
1) F-centres 2) Schottky defect 3) Frenkel defect 4) Interstitial positions
Ans: 1
52. Which one of the following elements has lowest melting point?
(A) Sn (B) Pb (C) Ge (D) C
Ans: A
53. An Iceberg is floating in the lake. If one considers the lake, iceberg and atmosphere as one system, what are the number of phases and components respectively.
(A) 3, 3 (B) 1, 1 (C) 3, 1 (D) 1, 3
Ans: C
54. High quantum yield of photochemical reactions is due to ____________.
(A) High frequency of collision (B) Accompanying side reactions (C) Formation of free radicals (D) Lowering of activation energy.
Ans: C
55. The HOMO in CO is __________.
(A) Sigma antibonding (B) Pi–antibonding (C) Pi–bonding (D) Sigma bonding
Ans: A
56. When a solid transforms into liquid at its melting point, the entropy (A) Becomes zero (B) Increases (C) Decreases (D) Remains constant
Ans: B
57. The value of activiation energy for a chemical reaction is primarily dependent on ___. (A) Temperature (B) Pressure (C) Concentration of reactants (D) Nature of reacting species
Ans: D
58. A plot of x/m versus temperature at constant pressure is called __________. (A) Adsorption isochore (B) Adsorption isobar (C) Adsorption isotherm (D) Absorption isobar
Ans: B
59. The colloidal system in which the dispersed phase and dispersion medium are both liquids is known as __________. (A) A foam (B) An aerosol (C) A gel (D) An emulsion
Ans: D
60. Which one of the following radiation has highest frequency? (A) X-ray (B) Radiowave (C) Infra-red (D) Microwave
Ans: A
61. Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields :
1) ethyl butyrate
2) acetoacetic ester
3) methyl acetoacetate
4) ethyl propionate
Ans: 2
63. Which of the following is not chiral ?
1) 2-butanol
2) 2, 3-dibromopentane
3) 3-bromopentane
4) 2-hydroxypropanoic acid
Ans: 3
68. A solution of acetone in ethanol :
1) shows a negative deviation from Raoult's law
2) shows a positive deviation from Raoult's law
3) behaves like a near ideal solution
4) obeys Raoult's law
Ans: 2
69. A hypothetical electrochemical cell is shown below A|A+ (xM)|| B+ (yM)| B The emf measured is +0.20V. The cell reaction is :
1) A+ + B → A + B+
2) A+ + e- → A; B+ + e- → B
3) the cell reaction cannot be predicted
4) A + B+ → A+ + B
Ans: 4
70. Ethylene oxide when treated with Grignard reagent yields :
1) secondary alcohol
2) tertiary alcohol
3) cyclopropyl alcohol
4) primary alcohol
Ans: 4
71. During osmosis, flow of water through a semi-permeable membrane is :
1) from solution having higher concentration only
2) from both sides of semi-permeable membrane with equal flow rates
3) from both sides of semi-permeable membrane with unequal flow rates
4) from solution having lower concentration only
Ans: 4
72. Which of the following is more basic than aniline ?
1) Diphenylamine 2) Triphenylamine 3) p-nitroaniline 4) Benzylamine
Ans: 4
73. In which of the following molecules are all the bonds not equal ?
1) ClF3 2) BF3 3) AlF3 4) NF3
Ans: 1
74. The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of NH3 (1.5 D) is larger than that of NF 3 (0.2 D). This is because :
1) in NH3 as well as in NF3 the atomic dipole and bond dipole are in the same direction
2) in NH3 the atomic dipole and bond dipole are in the same direction whereas in NF 3 these are in opposite directions
3) in NH3 as well as NF3 the atomic dipole and bond dipole are in opposite directions
4) in NH3 the atomic dipole and bond dipole are in the opposite directions whereas in NF 3 these are in the same directions
Ans: 2
75. The correct order of the mobility of the alkali metal ions in aqueous solution is :
1) Li+ > Na+ > K+ > Rb+
2) Na+ > K+ > Rb+ > Li+
3) K+ > Rb+ > Na+ > Li+
4) Rb+ > K+ > Na+ > Li+
Ans: 4
76. The corect order regarding the electronegativity of hybrid orbitals of carbon is :
1) sp > sp2 < sp3
2) sp > sp2 > sp3
3) sp < sp2 > sp3
4) sp < sp2 < sp3
Ans: 2
77. Which of the following species has a linear shape ?
1) NO-2 2) SO2 3) NO+2 4) O3
Ans: 3
78. Which of the following is the most basic oxide ?
1) Al2O3 2) Sb2O3 3) Bi2O3 4) SeO2
Ans: 3
79. The orientation of an atomic orbital is governed by :
1) azimuthal quantum number 2) spin quantum number
3) magnetic quantum number 4) principal quantum number
Ans: 3
80. Which of the following is not a correct statement ?
1) The electron-deficient molecules can act as Lewis acids
2) The canonical structures have no real existence
3) Every AB5 molecule does in fact have square pyramid structure
4) Multiple bonds are always shorter than corresponding single bonds
Ans: 3
81. Bronze is a mixture of ________.
(A) Cu + Sn (B) Pb + Zn (C) Cu + Zn (D) Pb + Sn
Ans: A
82. Order of variation of particle size is in ________ order.
(A) Suspension > Colloid > Solution (B) Solution > Colloid > Suspension
(C) Colloid > Suspension > solution (D) Solution > Suspension > Colloid
Ans: A
83. Which one of the following possesses Peroxy linkage?
(A) Sulphuric acid (B) Oleum (C) Hydrochloric acid (D) Marshall’s acid
Ans: D
84. In Goldschmidt’s thermite process, the reducing agent used is _____.
(A) Fe (B) Cu (C) Al (D) Ca
Ans: C
85. The energy of an ideal gas depends only on its _____.
(A) Volume (B) Pressure (C) Number of moles (D) Temperature
Ans: D
86. The ratio of molar heats of vaporization and boiling point of a liquid is constant. This is known as _____.
(A) Van’t Hoff rule (B) Trouton’s rule (C) Phase rule (D) Ostwald’s rule
Ans: B
87. Reason behind yellow colour of Silver Iodide is _____.
(A) Incorporating the iodide anion (B) Because of its straight forward ionic property
(C) Bonding is neither ionic nor covalent (D) Incorporating silver cation.
Ans: C
88. If there is no change at heat (q) between the system and surrounding during various operations is referred as _____.
(A) Isobaric process (B) Isochoric process (C) Adiabatic process (D) Reversible process
Ans: C
89. Arrange the following compounds in order of Ka value:
(i) Perchloric acid (ii) Hydroiodic acid (iii) Hydrochloric acid (iv) Sulphuric acid
(A) i>ii>iii>iv (B) i<ii<iii<iv (C) ii>i>iii<iv (D) ii>i>iii>iv
Ans: D
90. According to pKa value, weak acid is identified where pKa is _______.
(A) pKa>0 (B) pKa<0 (C) pKa=0 (D) pKa= –1
Ans: A
91. In the structure of nucleic acid, nucleotide contains _______.
(A) Sugar + Base (B) Sugar + Phosphoric acid (C) Sugar + Phosphoric acid + Base (D) Base + Phosphoric acid
Ans: C
92. Arrange the following elements in order of increasing metallic character: P, Na, Mg, Si
(A) P>Na>Mg>Si
(B) P<Na<Mg<Si
(C) P<Si<Mg<Na
(D) P<Si=Mg<Na
Ans: C
93. CFSE of transition metal complexes can be determined by
(A) UV-Visible spectroscopy (B) IR-Spectroscopy (C) Microwave spectroscopy (D) NMR spectroscopy
Ans: A
94. Froth floatation process for the concentration of the ores is an illustration of the practical application of ________.
(A) Absorption (B) Adsorption (C) Sedimentation (D) Coagulation
Ans: B
95. Main function of roasting is ________.
(A) To remove volatile substance (B) Slag formation (C) Oxidation (D) Reduction
Ans: A
96. Which one of the following sentence is incorrect for work?
(A) The work is zero if there is no change. (B) Work is path independent quantity.
(C) When work is done by the system, its energy decreases. (D) When work is done on the system, its energy increases.
Ans: B
97. 1 cal = _____ J.
(A) 4.234 J (B) 4.198 J (C) 3.134 J (D) 2.802 J
Ans: B
98. A catalytic poison is _____.
(A) An inhibitor (B) Autocatalyst (C) Induced catalyst (D) Heterogeneous catalyst
Ans: A
99. __________ is a biological catalyst.
(A) An enzyme (B) An amino acid (C) A carbohydrate (D) A nitrogen molecule
Ans: A
100. Which one of the following acts as a catalyst?
(A) Metals with non-variable valency (B) Metals with variable valency
(C) Inert gases (D) Non-metals with fixed valency.
Ans: B
1) F-centres 2) Schottky defect 3) Frenkel defect 4) Interstitial positions
Ans: 1
52. Which one of the following elements has lowest melting point?
(A) Sn (B) Pb (C) Ge (D) C
Ans: A
53. An Iceberg is floating in the lake. If one considers the lake, iceberg and atmosphere as one system, what are the number of phases and components respectively.
(A) 3, 3 (B) 1, 1 (C) 3, 1 (D) 1, 3
Ans: C
54. High quantum yield of photochemical reactions is due to ____________.
(A) High frequency of collision (B) Accompanying side reactions (C) Formation of free radicals (D) Lowering of activation energy.
Ans: C
55. The HOMO in CO is __________.
(A) Sigma antibonding (B) Pi–antibonding (C) Pi–bonding (D) Sigma bonding
Ans: A
56. When a solid transforms into liquid at its melting point, the entropy (A) Becomes zero (B) Increases (C) Decreases (D) Remains constant
Ans: B
57. The value of activiation energy for a chemical reaction is primarily dependent on ___. (A) Temperature (B) Pressure (C) Concentration of reactants (D) Nature of reacting species
Ans: D
58. A plot of x/m versus temperature at constant pressure is called __________. (A) Adsorption isochore (B) Adsorption isobar (C) Adsorption isotherm (D) Absorption isobar
Ans: B
59. The colloidal system in which the dispersed phase and dispersion medium are both liquids is known as __________. (A) A foam (B) An aerosol (C) A gel (D) An emulsion
Ans: D
60. Which one of the following radiation has highest frequency? (A) X-ray (B) Radiowave (C) Infra-red (D) Microwave
Ans: A
61. Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields :
1) ethyl butyrate
2) acetoacetic ester
3) methyl acetoacetate
4) ethyl propionate
Ans: 2
63. Which of the following is not chiral ?
1) 2-butanol
2) 2, 3-dibromopentane
3) 3-bromopentane
4) 2-hydroxypropanoic acid
Ans: 3
68. A solution of acetone in ethanol :
1) shows a negative deviation from Raoult's law
2) shows a positive deviation from Raoult's law
3) behaves like a near ideal solution
4) obeys Raoult's law
Ans: 2
69. A hypothetical electrochemical cell is shown below A|A+ (xM)|| B+ (yM)| B The emf measured is +0.20V. The cell reaction is :
1) A+ + B → A + B+
2) A+ + e- → A; B+ + e- → B
3) the cell reaction cannot be predicted
4) A + B+ → A+ + B
Ans: 4
70. Ethylene oxide when treated with Grignard reagent yields :
1) secondary alcohol
2) tertiary alcohol
3) cyclopropyl alcohol
4) primary alcohol
Ans: 4
71. During osmosis, flow of water through a semi-permeable membrane is :
1) from solution having higher concentration only
2) from both sides of semi-permeable membrane with equal flow rates
3) from both sides of semi-permeable membrane with unequal flow rates
4) from solution having lower concentration only
Ans: 4
72. Which of the following is more basic than aniline ?
1) Diphenylamine 2) Triphenylamine 3) p-nitroaniline 4) Benzylamine
Ans: 4
73. In which of the following molecules are all the bonds not equal ?
1) ClF3 2) BF3 3) AlF3 4) NF3
Ans: 1
74. The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of NH3 (1.5 D) is larger than that of NF 3 (0.2 D). This is because :
1) in NH3 as well as in NF3 the atomic dipole and bond dipole are in the same direction
2) in NH3 the atomic dipole and bond dipole are in the same direction whereas in NF 3 these are in opposite directions
3) in NH3 as well as NF3 the atomic dipole and bond dipole are in opposite directions
4) in NH3 the atomic dipole and bond dipole are in the opposite directions whereas in NF 3 these are in the same directions
Ans: 2
75. The correct order of the mobility of the alkali metal ions in aqueous solution is :
1) Li+ > Na+ > K+ > Rb+
2) Na+ > K+ > Rb+ > Li+
3) K+ > Rb+ > Na+ > Li+
4) Rb+ > K+ > Na+ > Li+
Ans: 4
76. The corect order regarding the electronegativity of hybrid orbitals of carbon is :
1) sp > sp2 < sp3
2) sp > sp2 > sp3
3) sp < sp2 > sp3
4) sp < sp2 < sp3
Ans: 2
77. Which of the following species has a linear shape ?
1) NO-2 2) SO2 3) NO+2 4) O3
Ans: 3
78. Which of the following is the most basic oxide ?
1) Al2O3 2) Sb2O3 3) Bi2O3 4) SeO2
Ans: 3
79. The orientation of an atomic orbital is governed by :
1) azimuthal quantum number 2) spin quantum number
3) magnetic quantum number 4) principal quantum number
Ans: 3
80. Which of the following is not a correct statement ?
1) The electron-deficient molecules can act as Lewis acids
2) The canonical structures have no real existence
3) Every AB5 molecule does in fact have square pyramid structure
4) Multiple bonds are always shorter than corresponding single bonds
Ans: 3
81. Bronze is a mixture of ________.
(A) Cu + Sn (B) Pb + Zn (C) Cu + Zn (D) Pb + Sn
Ans: A
82. Order of variation of particle size is in ________ order.
(A) Suspension > Colloid > Solution (B) Solution > Colloid > Suspension
(C) Colloid > Suspension > solution (D) Solution > Suspension > Colloid
Ans: A
83. Which one of the following possesses Peroxy linkage?
(A) Sulphuric acid (B) Oleum (C) Hydrochloric acid (D) Marshall’s acid
Ans: D
84. In Goldschmidt’s thermite process, the reducing agent used is _____.
(A) Fe (B) Cu (C) Al (D) Ca
Ans: C
85. The energy of an ideal gas depends only on its _____.
(A) Volume (B) Pressure (C) Number of moles (D) Temperature
Ans: D
86. The ratio of molar heats of vaporization and boiling point of a liquid is constant. This is known as _____.
(A) Van’t Hoff rule (B) Trouton’s rule (C) Phase rule (D) Ostwald’s rule
Ans: B
87. Reason behind yellow colour of Silver Iodide is _____.
(A) Incorporating the iodide anion (B) Because of its straight forward ionic property
(C) Bonding is neither ionic nor covalent (D) Incorporating silver cation.
Ans: C
88. If there is no change at heat (q) between the system and surrounding during various operations is referred as _____.
(A) Isobaric process (B) Isochoric process (C) Adiabatic process (D) Reversible process
Ans: C
89. Arrange the following compounds in order of Ka value:
(i) Perchloric acid (ii) Hydroiodic acid (iii) Hydrochloric acid (iv) Sulphuric acid
(A) i>ii>iii>iv (B) i<ii<iii<iv (C) ii>i>iii<iv (D) ii>i>iii>iv
Ans: D
90. According to pKa value, weak acid is identified where pKa is _______.
(A) pKa>0 (B) pKa<0 (C) pKa=0 (D) pKa= –1
Ans: A
91. In the structure of nucleic acid, nucleotide contains _______.
(A) Sugar + Base (B) Sugar + Phosphoric acid (C) Sugar + Phosphoric acid + Base (D) Base + Phosphoric acid
Ans: C
92. Arrange the following elements in order of increasing metallic character: P, Na, Mg, Si
(A) P>Na>Mg>Si
(B) P<Na<Mg<Si
(C) P<Si<Mg<Na
(D) P<Si=Mg<Na
Ans: C
93. CFSE of transition metal complexes can be determined by
(A) UV-Visible spectroscopy (B) IR-Spectroscopy (C) Microwave spectroscopy (D) NMR spectroscopy
Ans: A
94. Froth floatation process for the concentration of the ores is an illustration of the practical application of ________.
(A) Absorption (B) Adsorption (C) Sedimentation (D) Coagulation
Ans: B
95. Main function of roasting is ________.
(A) To remove volatile substance (B) Slag formation (C) Oxidation (D) Reduction
Ans: A
96. Which one of the following sentence is incorrect for work?
(A) The work is zero if there is no change. (B) Work is path independent quantity.
(C) When work is done by the system, its energy decreases. (D) When work is done on the system, its energy increases.
Ans: B
97. 1 cal = _____ J.
(A) 4.234 J (B) 4.198 J (C) 3.134 J (D) 2.802 J
Ans: B
98. A catalytic poison is _____.
(A) An inhibitor (B) Autocatalyst (C) Induced catalyst (D) Heterogeneous catalyst
Ans: A
99. __________ is a biological catalyst.
(A) An enzyme (B) An amino acid (C) A carbohydrate (D) A nitrogen molecule
Ans: A
100. Which one of the following acts as a catalyst?
(A) Metals with non-variable valency (B) Metals with variable valency
(C) Inert gases (D) Non-metals with fixed valency.
Ans: B