CHEMISTRY
UPSC Chemistry MCQs
CHEMISTRY MCQs
1. Which one of the following pairs represents stereoisomerism ?
1) Chain isomerism and rotational isomerism
2) Structural isomerism and geometric isomerism
3) Linkage isomerism and geometric isomerism
4) Optical isomerism and geomertric isomerism
Ans: 4
2. The correct order in which the O — O bond length increases in the following is :
1) H2O2 < O2 < O3
2) O3 < H2O2 < O2
3) O2 < O3 < H2O2
4) O2 < H2O2 < O3
Ans: 3
3. The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is : (Atomic mass Al = 27)
1) 180 kg
2) 120 kg
3) 360 kg
4) 90 kg
Ans: 4
4. The cell membranes are mainly composed of :
1) carbohydrates
2) proteins
3) phospholipids
4) fats
Ans: 3
5. The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is :
1) one fifth
2) five
3) one
4) two
Ans: 4
6. Which of the following molecules has trigonal planar geometry ?
1) IF 3
2) PCl3
3) NH3
4) BF 3
Ans: 4
7. The aqueous solution containing which one of the following ions will be colourless ? (Atomic no. : Sc = 21, Fe = 26, Ti = 22, Mn = 25)
1) Sc3+
2) Fe2+
3) Ti3+
4) Mn2+
Ans: 1
8. Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy ?
1) Vanadium (Z = 23)
2) Chromium (Z = 24)
3) Iron (Z = 26)
4) Manganese (Z = 25)
Ans: 4
9. A reaction occurs spontaneously if :
1) T∆S < ∆H and both ∆H and ∆S are +ve
2) T∆S > ∆H and both ∆H and ∆S are +ve
3) T∆S = ∆H and both ∆H and ∆S are +ve
4) T∆S > ∆H and ∆H is + ve and ∆S is -ve
Ans: 2
10. The correct sequence of increasing covalent character is represented by :
1) LiCl < NaCl < BeCl2
2) BeCl2 < NaCl < LiCl
3) NaCl < LiCl < BeCl2
4) BeCl2 < LiCl < NaCl
Ans: 3
11. 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
12. 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
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. The absolute enthalpy of neutralisation of the reaction :
MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) will be :
1) less than - 57.33 kJ mol-1
2) - 57.33 kJ mol-1
3) greater than -57.33 kJ mol-l
4) 57.33 kJ mol-1
Ans: 1
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. A solution of urea (mol. mass 56g mol-1) boils at 100.18°C at the atmospheric pressure. If kf and kb for water are 1.86 and 0.512K kg mol-1 respectively, the above solution will freeze at :
1) - 6.54° C
2) -65.4° C
3) 65.4° C
4) - 0.654° C
Ans: 4
26. Which functional group participates in disulphide bond formation in proteins ?
1) Thiolactone
2) Thiol
3) Thioether
4) Thioester
Ans: 2
27. Which one of the following is an inner orbital complex as well as diamagnetic in behaviour ? (Atomic no. : Zn = 30, Cr = 24, Co = 27, Ni = 28)
1) [Zn (NH3)6]2+
2) [Cr (NH3)6]3+
3) [Co (NH3)6]3+
4) [Ni (NH3)6]2+
Ans: 3
1) Chain isomerism and rotational isomerism
2) Structural isomerism and geometric isomerism
3) Linkage isomerism and geometric isomerism
4) Optical isomerism and geomertric isomerism
Ans: 4
2. The correct order in which the O — O bond length increases in the following is :
1) H2O2 < O2 < O3
2) O3 < H2O2 < O2
3) O2 < O3 < H2O2
4) O2 < H2O2 < O3
Ans: 3
3. The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is : (Atomic mass Al = 27)
1) 180 kg
2) 120 kg
3) 360 kg
4) 90 kg
Ans: 4
4. The cell membranes are mainly composed of :
1) carbohydrates
2) proteins
3) phospholipids
4) fats
Ans: 3
5. The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is :
1) one fifth
2) five
3) one
4) two
Ans: 4
6. Which of the following molecules has trigonal planar geometry ?
1) IF 3
2) PCl3
3) NH3
4) BF 3
Ans: 4
7. The aqueous solution containing which one of the following ions will be colourless ? (Atomic no. : Sc = 21, Fe = 26, Ti = 22, Mn = 25)
1) Sc3+
2) Fe2+
3) Ti3+
4) Mn2+
Ans: 1
8. Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy ?
1) Vanadium (Z = 23)
2) Chromium (Z = 24)
3) Iron (Z = 26)
4) Manganese (Z = 25)
Ans: 4
9. A reaction occurs spontaneously if :
1) T∆S < ∆H and both ∆H and ∆S are +ve
2) T∆S > ∆H and both ∆H and ∆S are +ve
3) T∆S = ∆H and both ∆H and ∆S are +ve
4) T∆S > ∆H and ∆H is + ve and ∆S is -ve
Ans: 2
10. The correct sequence of increasing covalent character is represented by :
1) LiCl < NaCl < BeCl2
2) BeCl2 < NaCl < LiCl
3) NaCl < LiCl < BeCl2
4) BeCl2 < LiCl < NaCl
Ans: 3
11. 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
12. 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
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. The absolute enthalpy of neutralisation of the reaction :
MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) will be :
1) less than - 57.33 kJ mol-1
2) - 57.33 kJ mol-1
3) greater than -57.33 kJ mol-l
4) 57.33 kJ mol-1
Ans: 1
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. A solution of urea (mol. mass 56g mol-1) boils at 100.18°C at the atmospheric pressure. If kf and kb for water are 1.86 and 0.512K kg mol-1 respectively, the above solution will freeze at :
1) - 6.54° C
2) -65.4° C
3) 65.4° C
4) - 0.654° C
Ans: 4
26. Which functional group participates in disulphide bond formation in proteins ?
1) Thiolactone
2) Thiol
3) Thioether
4) Thioester
Ans: 2
27. Which one of the following is an inner orbital complex as well as diamagnetic in behaviour ? (Atomic no. : Zn = 30, Cr = 24, Co = 27, Ni = 28)
1) [Zn (NH3)6]2+
2) [Cr (NH3)6]3+
3) [Co (NH3)6]3+
4) [Ni (NH3)6]2+
Ans: 3
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. Which one of the following is expected to exhibit optical isomerism ? (en = ethylenediamine)
1) cis-[Pt (NH3)2 Cl2]
2) trans-[Co (en)2 Cl2]
3) trans-[Pt (NH3)2 Cl2]
4) cis-[Co (en)2 Cl2]
Ans: 2
31. The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol-1 ; hence the energy of fourth Bohr orbit would be :
1) - 41 kJ mol-l
2) -1224 kJ mol-l
3) -284 kJ mol-l
4) -82 kJ mol-l
Ans: 4
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
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. Which one of the following is expected to exhibit optical isomerism ? (en = ethylenediamine)
1) cis-[Pt (NH3)2 Cl2]
2) trans-[Co (en)2 Cl2]
3) trans-[Pt (NH3)2 Cl2]
4) cis-[Co (en)2 Cl2]
Ans: 2
31. The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol-1 ; hence the energy of fourth Bohr orbit would be :
1) - 41 kJ mol-l
2) -1224 kJ mol-l
3) -284 kJ mol-l
4) -82 kJ mol-l
Ans: 4
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
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. A solution containing 10g per dm 3 of urea (molecular mass = 60g mol-1) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this non-volatile solute is :
1) 200 g mol-1 2) 300 g mol-1 3) 400 g mol-1 4) 500 g mol-1
Ans: 2
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. Assume each reaction is carried out in an open container. For which reaction will ∆H = ∆E ?
1) H2(g) + Br2(g) → 2HBr(g)
2) C(s) + 2H2O(g) → 2H2(g) + CO2(g)
3) PCl5(g) → PCl3(g) + Cl2(g)
4) 2CO(g) + O2(g) → 2CO2(g)
Ans: 1
43. The human body does not produce :
1) DNA 2) vitamins 3) hormones 4) enzymes
Ans: 2
44. CsBr crystallises in a body centred cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 x 1023 mo1-1, the density of CsBr is :
1) 42.5 g/cm 3 2) 2.25 g/ cm 3 3) 0.225 g/ cm 3 4) 4.25 g/ cm 3
Ans: 4
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. Given : The mass of electron is 9.11 x 10-31 kg Planck constant is 6.626 x 10-34 Js, the uncertainty involved in the measurement of velocity within a distance of 0.1 Å is :
1) 5.79 x 106 ms-1
2) 5.79 x 107 ms-1
3) 5.79 x 108 ms-1
4) 5.79 x 109 ms-1
Ans: 1
47. Copper sulphate dissolves in excess of KCN to give :
1) CuCN 2) [Cu(CN)4]3- 3) [Cu(CN)4]2- 4) Cu(CN)2
Ans: 2
48. In which of the following pairs are both the ions coloured in aqueous solution ?
(At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
1) Ni2+, Ti3+
2) Sc3+, Ti3+
3) Sc3+, Co2+
4) Ni2+, Cu+
Ans: 1
49. Al2O3 can be converted to anhydrous AlCl3 by heating :
1) Al2O3 with HCl gas
2) Al2O3 with NaCl in solid state
3) a mixture of Al2O3 and carbon in dry Cl2 gas
4) Al2O3 with Cl2 gas
Ans: 3
50. The enthalpy and entropy change for the reaction : Br2(l) + Cl2(g) → 2BrCl(g) are 30 kJ mol-1 and 105 JK-1 mol-1 respectively. The temperature at which the reaction will be in equilibrium is :
1) 285.7 K 2) 373 K 3) 250 K 4) 400 K
Ans: 1
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. A solution containing 10g per dm 3 of urea (molecular mass = 60g mol-1) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this non-volatile solute is :
1) 200 g mol-1 2) 300 g mol-1 3) 400 g mol-1 4) 500 g mol-1
Ans: 2
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. Assume each reaction is carried out in an open container. For which reaction will ∆H = ∆E ?
1) H2(g) + Br2(g) → 2HBr(g)
2) C(s) + 2H2O(g) → 2H2(g) + CO2(g)
3) PCl5(g) → PCl3(g) + Cl2(g)
4) 2CO(g) + O2(g) → 2CO2(g)
Ans: 1
43. The human body does not produce :
1) DNA 2) vitamins 3) hormones 4) enzymes
Ans: 2
44. CsBr crystallises in a body centred cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 x 1023 mo1-1, the density of CsBr is :
1) 42.5 g/cm 3 2) 2.25 g/ cm 3 3) 0.225 g/ cm 3 4) 4.25 g/ cm 3
Ans: 4
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. Given : The mass of electron is 9.11 x 10-31 kg Planck constant is 6.626 x 10-34 Js, the uncertainty involved in the measurement of velocity within a distance of 0.1 Å is :
1) 5.79 x 106 ms-1
2) 5.79 x 107 ms-1
3) 5.79 x 108 ms-1
4) 5.79 x 109 ms-1
Ans: 1
47. Copper sulphate dissolves in excess of KCN to give :
1) CuCN 2) [Cu(CN)4]3- 3) [Cu(CN)4]2- 4) Cu(CN)2
Ans: 2
48. In which of the following pairs are both the ions coloured in aqueous solution ?
(At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
1) Ni2+, Ti3+
2) Sc3+, Ti3+
3) Sc3+, Co2+
4) Ni2+, Cu+
Ans: 1
49. Al2O3 can be converted to anhydrous AlCl3 by heating :
1) Al2O3 with HCl gas
2) Al2O3 with NaCl in solid state
3) a mixture of Al2O3 and carbon in dry Cl2 gas
4) Al2O3 with Cl2 gas
Ans: 3
50. The enthalpy and entropy change for the reaction : Br2(l) + Cl2(g) → 2BrCl(g) are 30 kJ mol-1 and 105 JK-1 mol-1 respectively. The temperature at which the reaction will be in equilibrium is :
1) 285.7 K 2) 373 K 3) 250 K 4) 400 K
Ans: 1
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. The general molecular formula, which represents the homologous series of alkanols is :
1) CnH2nO2 2) CnH2nO 3) CnH2n+1O 4) CnH2n+2O
Ans: 4
53. If E°Fe2+/Fe = -0.441 V and E°Fe3+/Fe2+ = 0.771 V, the standard emf of the reaction : Fe + 2Fe3+ → 3Fe2+ will be :
1) 0.441 V 2) 1.753 V 3) 1.212 V 4) 0.211 V
Ans: 3
54. For the reaction 2A + B → 3C + D which of the following does not express the reaction rate ?
1) -(d[C]/3dt) 2) -(d[B]/dt 3) d[D]/dt 4) -d[A]/2dt
Ans: 1
55. For the reaction, CH4(g) + 2O2 (g) CO2(g) + 2H2O(l), ∆rH = -170.8 kJ mol-1 Which of the following statements is not true ?
1) At equilibrium, the concentrations of CO2 (g) and H2O (l)are not equal
2) The equilibrium constant for the reaction is given by Kp = [CO2]/[CH4][O2]
3) Addition of CH4(g) or O2(g) at equilibrium will cause a shift to the right
4) The reaction is exothermic
Ans: 2
56. [NH(CH2)NHCO(CH2)4CO]n is a :
1) co-polymer 2) addition polymer 3) thermo-setting polymer 4) homopolymer
Ans: 1
57. 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
58. Which one of the following is a peptide hormone ?
1) Glucagon 2) Testosterone 3) Thyroxin 4) Adrenaline
Ans: 1
59. The major organic product in the reaction, CH3 – O – CH(CH3)2 + HI → Product is :
1) CH3OH + (CH3 )2CHI
2) ICH2OCH (CH3)2
3) CH3O C(CH3)2
4) CH3I + (CH3)2CHOH
Ans: 4
60. The enthalpy of combustion of H2, cyclohexene (C6H10) and cyclohexene (C6H12) are - 241, -3800 and -3920 kJ per mol respectively. Heat of hydrogenation of cyclohexene is :
1) - 121 kJ per mol
2) + 121 kJ per mol
3) + 484 kJ per mol
4) - 484 kJ per mol
Ans: 1
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
62. Consider the reaction N2(g) + 3H2(g) → 2NH3(g) The equality relationship between (d[NH3]/dt) and -(d[H2]/dt) is :
1) (d[NH3]/dt) = -(1/3)(d[H2]/dt)
2) +(d[NH3]/dt) = -(2/3)(d[H2]/dt)
3) +(d[NH3]/dt) = -(3/2)(d[H2]/dt)
4) (d[NH3]/dt) = -(d[H2]/dt)
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
64. [Co(NH3)4(NO2)2]Cl exhibits :
1) linkage isomerism, ionization isomerism and optical isomerism
2) linkage isomerism, ionization isomerism and geometrical isomerism
3) ionization isomerism, geometrical isomerism and optical isomerism
4) linkage isomerism, geometrical isomerism and optical isomerism
Ans: 2
65. 1.00 g of a non-electrolyte solute (molar mass 250g mol-1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol-1, the freezing point of benzene will be lowered by :
1) 0.4 K 2) 0.8 K 3) 0.12 K 4) 0.24 K
Ans: 1
66. Which of the following pairs constitutes a buffer ?
1) HNO2 and NaNO2
2) NaOH and NaCl
3) HNO3 and NH4NO3
4) HCl and KCl
Ans: 1
67. The hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298 K (Kw = 10-14) is :
1) 1.0525 x 10-6 M
2) 1.0525 x 10-7 M
3) 8.525 x 10-8 M
4) 1.0525 x 10-8 M
Ans: 2
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. 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
82. 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
83. Which of the following is not isostructural with SiCl4 ?
1) SCl4 2) SO2-4 3) PO3-4 4) NH+4
Ans: 1
1) F-centres 2) Schottky defect 3) Frenkel defect 4) Interstitial positions
Ans: 1
52. The general molecular formula, which represents the homologous series of alkanols is :
1) CnH2nO2 2) CnH2nO 3) CnH2n+1O 4) CnH2n+2O
Ans: 4
53. If E°Fe2+/Fe = -0.441 V and E°Fe3+/Fe2+ = 0.771 V, the standard emf of the reaction : Fe + 2Fe3+ → 3Fe2+ will be :
1) 0.441 V 2) 1.753 V 3) 1.212 V 4) 0.211 V
Ans: 3
54. For the reaction 2A + B → 3C + D which of the following does not express the reaction rate ?
1) -(d[C]/3dt) 2) -(d[B]/dt 3) d[D]/dt 4) -d[A]/2dt
Ans: 1
55. For the reaction, CH4(g) + 2O2 (g) CO2(g) + 2H2O(l), ∆rH = -170.8 kJ mol-1 Which of the following statements is not true ?
1) At equilibrium, the concentrations of CO2 (g) and H2O (l)are not equal
2) The equilibrium constant for the reaction is given by Kp = [CO2]/[CH4][O2]
3) Addition of CH4(g) or O2(g) at equilibrium will cause a shift to the right
4) The reaction is exothermic
Ans: 2
56. [NH(CH2)NHCO(CH2)4CO]n is a :
1) co-polymer 2) addition polymer 3) thermo-setting polymer 4) homopolymer
Ans: 1
57. 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
58. Which one of the following is a peptide hormone ?
1) Glucagon 2) Testosterone 3) Thyroxin 4) Adrenaline
Ans: 1
59. The major organic product in the reaction, CH3 – O – CH(CH3)2 + HI → Product is :
1) CH3OH + (CH3 )2CHI
2) ICH2OCH (CH3)2
3) CH3O C(CH3)2
4) CH3I + (CH3)2CHOH
Ans: 4
60. The enthalpy of combustion of H2, cyclohexene (C6H10) and cyclohexene (C6H12) are - 241, -3800 and -3920 kJ per mol respectively. Heat of hydrogenation of cyclohexene is :
1) - 121 kJ per mol
2) + 121 kJ per mol
3) + 484 kJ per mol
4) - 484 kJ per mol
Ans: 1
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
62. Consider the reaction N2(g) + 3H2(g) → 2NH3(g) The equality relationship between (d[NH3]/dt) and -(d[H2]/dt) is :
1) (d[NH3]/dt) = -(1/3)(d[H2]/dt)
2) +(d[NH3]/dt) = -(2/3)(d[H2]/dt)
3) +(d[NH3]/dt) = -(3/2)(d[H2]/dt)
4) (d[NH3]/dt) = -(d[H2]/dt)
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
64. [Co(NH3)4(NO2)2]Cl exhibits :
1) linkage isomerism, ionization isomerism and optical isomerism
2) linkage isomerism, ionization isomerism and geometrical isomerism
3) ionization isomerism, geometrical isomerism and optical isomerism
4) linkage isomerism, geometrical isomerism and optical isomerism
Ans: 2
65. 1.00 g of a non-electrolyte solute (molar mass 250g mol-1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol-1, the freezing point of benzene will be lowered by :
1) 0.4 K 2) 0.8 K 3) 0.12 K 4) 0.24 K
Ans: 1
66. Which of the following pairs constitutes a buffer ?
1) HNO2 and NaNO2
2) NaOH and NaCl
3) HNO3 and NH4NO3
4) HCl and KCl
Ans: 1
67. The hydrogen ion concentration of a 10-8 M HCl aqueous solution at 298 K (Kw = 10-14) is :
1) 1.0525 x 10-6 M
2) 1.0525 x 10-7 M
3) 8.525 x 10-8 M
4) 1.0525 x 10-8 M
Ans: 2
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. 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
82. 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
83. Which of the following is not isostructural with SiCl4 ?
1) SCl4 2) SO2-4 3) PO3-4 4) NH+4
Ans: 1
84. 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
85. 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
86. 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
87. 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
88. Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL– 1. Volume of acid required to make one litre of 0.1MH2SO4 solution is
(a) 16.65 mL (b) 22.20 mL (c) 5.55 mL (d) 11.10 mL
Ans: C
89. 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
90. 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
91. 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
92. Which of the following is water-soluble?
(a) Vitamin E (b) Vitamin K (c) Vitamin A (d) Vitamin B
Ans: D
93. 0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol– 1,the lowering in freezing point of the solution is
(a) 0.56 K (b) 1.12 K (c) – 0.56 K (d) – 1.12 K
Ans: B
94. Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and its concentrated by chemical leaching?
(a) Galena (b) Copper pyrite (c) Sphalerite (d) Argentite
Ans: D
95. If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately
(a) 45 minutes (b) 60 minutes (c) 40 minutes (d) 50 minutes (log 4 = 0.60, log 5 = 0.69)
Ans: A
96. In which of the following the hydration energy is higher than the lattice energy?
(a) MgSO4 (b) RaSO4 (c) SrSO4 (d) BaSO4
Ans: A
97. Which of the compounds with molecular formula C5H10 yields acetone on ozonolysis? (a) 3-methyl-1-butene (b) cyclopentane (c) 2-methyl-1-butene (d) 2-methyl-2-butene.
Ans: D
98. Which one of the following orders correctly represents the increasing acid strengths of the given acids?
(a) HOClO < HOCl < HOClO3 < HOClO2
(b) HOClO2 < HOClO3 < HOClO < HOCl
(c) HOClO3 < HOClO2 < HOClO < HOCl
(d) HOCl < HOClO < HOClO2 < HOClO3
Ans: D
99. Consider the following sets of quantum numbers: n l m s
(i) 3 0 0 + 1/2
(ii) 2 2 1 + 1/2
(iii) 4 3 – 2 – 1/2
(iv) 1 0 – 1 – 1/2
(v) 3 2 3 + 1/2
Which of the following sets of quantum number is not possible?
(a) (i), (ii), (iii) and (iv)
(b) (ii), (iv) and (v)
(c) (i) and (iii)
(d) (ii), (iii) and (iv)
Ans: B
100. Which one of the following polymers is prepared by condensation polymerisation?
(a) Teflon (b) Natural rubber (c) Styrene (d) Nylon-66
Ans: D
(a) Methyl isocyanide (b) Acetamide (c) Methyl cyanide (d) Nitroethane.
Ans: A
85. 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
86. 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
87. 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
88. Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL– 1. Volume of acid required to make one litre of 0.1MH2SO4 solution is
(a) 16.65 mL (b) 22.20 mL (c) 5.55 mL (d) 11.10 mL
Ans: C
89. 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
90. 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
91. 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
92. Which of the following is water-soluble?
(a) Vitamin E (b) Vitamin K (c) Vitamin A (d) Vitamin B
Ans: D
93. 0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol– 1,the lowering in freezing point of the solution is
(a) 0.56 K (b) 1.12 K (c) – 0.56 K (d) – 1.12 K
Ans: B
94. Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and its concentrated by chemical leaching?
(a) Galena (b) Copper pyrite (c) Sphalerite (d) Argentite
Ans: D
95. If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately
(a) 45 minutes (b) 60 minutes (c) 40 minutes (d) 50 minutes (log 4 = 0.60, log 5 = 0.69)
Ans: A
96. In which of the following the hydration energy is higher than the lattice energy?
(a) MgSO4 (b) RaSO4 (c) SrSO4 (d) BaSO4
Ans: A
97. Which of the compounds with molecular formula C5H10 yields acetone on ozonolysis? (a) 3-methyl-1-butene (b) cyclopentane (c) 2-methyl-1-butene (d) 2-methyl-2-butene.
Ans: D
98. Which one of the following orders correctly represents the increasing acid strengths of the given acids?
(a) HOClO < HOCl < HOClO3 < HOClO2
(b) HOClO2 < HOClO3 < HOClO < HOCl
(c) HOClO3 < HOClO2 < HOClO < HOCl
(d) HOCl < HOClO < HOClO2 < HOClO3
Ans: D
99. Consider the following sets of quantum numbers: n l m s
(i) 3 0 0 + 1/2
(ii) 2 2 1 + 1/2
(iii) 4 3 – 2 – 1/2
(iv) 1 0 – 1 – 1/2
(v) 3 2 3 + 1/2
Which of the following sets of quantum number is not possible?
(a) (i), (ii), (iii) and (iv)
(b) (ii), (iv) and (v)
(c) (i) and (iii)
(d) (ii), (iii) and (iv)
Ans: B
100. Which one of the following polymers is prepared by condensation polymerisation?
(a) Teflon (b) Natural rubber (c) Styrene (d) Nylon-66
Ans: D