This document contains a chemistry exam with multiple choice questions. It tests concepts related to redox reactions, gas laws, organic chemistry reactions, transition metals, acid-base chemistry, and more. There are 65 total questions with 4 possible answers for each question labeled A, B, C, or D. The questions cover a wide range of chemistry topics and concepts at an undergraduate level.

1. AEEE –Past papersCHEMISTRY - UNSOLVED PAPER - 2006

2. SECTION – IStraight Objective TypeThis section contains multiple choice questions numbered 75. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

3. Problem01Which of the following is a redox reaction ? NaCl + KNO3 NaNO3 + KClCaC2O4 + 2HCl CaCl2 + H2C2O4Ca(OH)2 + 2NH4Cl CaCl2 + 2NH3 + 2H2O2K[Ag(CN)2] + Zn 2Ag + K2 [Zn(CN)4]

4. Problem02For an ideal gas, number of mol per litre in terms of its pressure P, temperature T and gas constant R is : PT/RPRTP/RTRT/P

5. Problem03 Number of P – O bonds in P4O10 is : 1716156

6. Problem04 KO2 is used in space and submarines because it : Absorbs CO2 and increases O2 concentration Absorbs moisture Absorbs CO2Produces ozone

7. Problem05 Which of the following ions has the maximum magnetic moment ? Mn2+Fe2+Ti2+Cr2+

8. Problem06 Acetylene does not react with : NaAmmonical AgNO3HClNaOH

9. Problem07 Compound A given belowis : Antiseptic Antibiotic Analgesic Pesticide

10. Problem08 For the following cell with hydrogen electrodes at two different pressures p1 and p2Pt (H2) | H+(aq.) | Pt (H2)p1 1M p2emf is given by :a.b.c.d.

11. Problem09Acetylene reacts with hypochlorous acid to form : Cl2CHCHOClCH2COOHCH3COClClCH2CHO

12. Problem10On heating benzyl amine with chloroform and ethanolic KOH, product obtained is : Benzyl alcohol BenzaldehydeBenzonitrileBenzyl isocyanide

13. Problem11Which of the following reaction is possible at anode ? a.b.c.d.

14. Problem12Which of the following concentration factor is affected by change in temperature ? MolarityMolalityMol fraction Weight fraction

15. Problem13Cyanide process is used for the extraction of : Barium Silver Boron Zinc

16. Problem14Following reaction (CH3)3CBr + H2O (CH3)3COH + HBr is an example of : Elimination reaction Free radical substitution Nucleophilic substitution Electrophilic substitution

17. Problem15A metal M forms water soluble MSO4 and inert MO. MO in aqueous solution forms insoluble M(OH)2 soluble in NaOH. Metal M is : BeMgCaSi

18. Problem16Half life of a substance A following first order kinetics is 5 days. Starting with 100 g of A, amount left after 15 days is : 25 g50 g12.5 g6.25 g

19. Problem17The most stable ion is : [Fe(OH)5]3-[FeCl6]3-[Fe(CN)6]3-[Fe(H2O)6]3+

20. Problem18A substance forms zwitter ion. It can have functional groups : - NH2, - COOH- NH2, - SO3 HBoth None of these

21. Problem19If Fe3+ and Cr3+ both are both are present in group III of qualitative analysis, then distinction can be made by : Addition of NH4OH in presence of NH4Cl when only Fe(OH)3 is precipitated Addition of NH4OH in presence of NH4Cl when Cr(OH)3 and Fe(OH)3 both are precipitated and on adding Br2 water and NaOH, Cr(OH)3 dissolves Precipitate of Cr(OH)3 and Fe(OH)3 as obtained in (b) are treated with conc. HCl when only Fe(OH)3 dissolves (b) and (c) the correct

22. Problem20In an organic compound of molar mass 108 g mol-1 C, H and N atoms are present in 9 : 1 : 3.5 by weight. Molecular formula can be : C6H8N2C7H10NC5H6N3C4H18N3

23. Problem21Solubility of Ca(OH)2 is S mol litre-1. the solubility product (Ksp) under the same condition is : 4S33S44S2S3

24. Problem22Heat required to raise the temperature of 1 mol of a substance by 10 is called : Specific heat Molar heat capacity Water equivalent Specific gravity

25. Problem23β- particle is emitted in a radioactive reaction when A proton changes to neutron A neutron changes to proton A neutron changes to electron An electron changes to neutron

26. Problem24In a mixture of A and B, components show negative deviation when : A – B interaction is stronger than A – A and B – B interaction A – B interaction is weaker than A – A and B – B interaction Vmix > 0, Smix > 0Vmix = 0, Smix > 0

27. Problem25Refining of impure copper with zinc impurity is to be done by electrolysis using electrons as : Cathode Anode Pure cop pure zincPure zinc pure copper Pure copper impure copper Pure zinc impure zinc

28. Problem26Aluminium is extracted by the electrolysis of : Alumina Bauxite Molten cryoliteAlumina mixed with molten cryolite

29. Problem27For an aqueous solution, freezing point is – 0.1860C. Elevation of the boiling point of the same solution is (Kf = 1.860 mol-1 kg and Kb = 0.5120 mol-1 kg) : 0.18600.051201.8605.120

30. Problem28Underlined carbon is sp3hybridised in : CH3 H = CH2CH3 H2NH2CH3 ONH2CH3 CH2 N

31. Problem29Bond angle of 109028’ is found in : NH3H2O

32. Problem30For a reaction , rate is given by + hence the order of the reaction is : 3210

33. Problem31CH3MgI is an organometalliccompound due to : Mg – I bond C – I bond C – Mg bond C – H bond

34. Problem32One of the following species acts as both Bronsted acid and base : H2PO HPO HPO All of the above

35. Problem33Hybridisation of the underline atom changes in : a.b.c.d. In all cases

36. Problem34Racemic mixture is formed by mixing two : Isomeric compounds Chiral compounds Meso compounds Enantiomers with chiral carbon

37. Problem35The number of lone pairs on Xe in XeF2, XeF4 and XeF6 respectively are : 3, 2, 12, 4, 61, 2, 36, 4, 2

38. Problem36An aqueous solution of 1 M NaCl and 1M HCl is : Not a buffer but pH < 7Not a buffer but pH > 7A buffer with pH < 7A buffer with pH > 7

39. Problem37Consider following tow reactions k1 and k2 are expressed in terms of molarity (mol L-1) and time (sec-1) as : sec-1, M sec-1 L-1M sec-1, M sec-1sec-1, M sec-1M sec-1, L-1 sec-1

40. Problem38RNA contains : Ribose sugar and thymine Ribose sugar and uracilDeoxyribose sugar and uracilDeoxyribose sugar and thymine

41. Problem39For a cell given below : Ag |Ag+ | | Cu2+ +| Cu E0 = x E0 = yE0 cell is : x + 2y2x + yy – xy – 2x

42. Problem40Based on kinetic theory of gases following laws can be proved : Boyle’s law Charle’s law Avogadro’s law All of these

43. Problem41MnO is a good oxidizing agent in different medium changing to MnO-4 Mn2+ MnO2-4 MnO2 Mn2O3Changes in oxidation number respectively are : 1, 3, 4, 55, 4, 3, 25, 1, 3, 42, 6, 4, 3

44. Problem42For the reaction : H2 + I2 2HI, the differential rate law is :a.b.c.d.

45. Problem43Number of atoms in 560 g of Fe (atomic mass 56 g mol-1) is : Is twice that of 70 g NIs half that of 20 g HBoth are correct None is correct

46. Problem44Geometrical isomerism is not shown by : 1, 1-dicholoro-1-pentene 1, 2-dichloro-1-pentene 1, 3-dichloro-2-pentene 1.4-dichloro-2-pentene

47. Problem45Number of atoms in the unit cell of Na (BCC type crystal) and Mg (FCC type crystal) are respectively : 4, 44, 22, 41, 1

48. Problem46Which of the following compounds has incorrect IUPAC nomenclature ? 2-methyl-3-pentanone CH3CHCHCH3 | |Ethylbutanoate H3C OH 2-methyl-3-butano3methyl butanalEnd product of the following reaction is : (RT)1/2(RT)-1/2(RT)(RT)-1

49. Problem47Which of the following compounds has incorrect IUPAC nomenclature ? 2-methyl-3-pentanone CH3CHCHCH3 | |Ethylbutanoate H3C OH 2-methyl-3-butano3methyl butanalEnd product of the following reaction is : (RT)1/2(RT)-1/2(RT)(RT)-1

50. Problem48For the following reactions in gaseous phase is : (RT)1/2(RT) -1/2(RT)-1(RT)

51. Problem49Energy of H-atom in the ground state is – 13.6 eV, hence energy in the secnd excited state is : - 6.8 eV-3.4 eV- 1.51 eV- 4.53 eV

52. Problem50A square planar complex is formed by hybridization of the following atomic orbitals : s, Px, Py, Pzs, Px, Py, Pz, dd, s, Px, Pys, Px, Py, Pz, d, d

53. Problem51Type of isomerism shown by [Cr(NH3)5NO2]Cl2 is : Optical Ionization Geometrical Linkage

54. Problem52One of the following equilibrium is not affected by change in volume of the flask : PCl5(g) PCl3 (g) + Cl2(g)N2(g) + 3H2(g) 2NH3 (g)N2(g) + O2(g) 3NO(g)SO2Cl2(g) SO2(g) + Cl2(g)

55. Problem53Uncertainty in position of a particle of 25 g in space is 10-5 m. Hence uncertainty in velocity (ms-1) is (Planck’s constant h = 6.6 x 10-34 Js) : 2.1 x 10-282.1 x 10-340.5 x 10-345.0 x 10-24

56. Problem54Consider the following reactions at 11000C2C + O2 2CO, = -460 kJ mol-12Zn + O2 2ZnO, = -360 kJ mol-1Based on these, select correct alternate : Zinc can be oxidized by COZinc oxide can be reduced by carbonBoth are correct None is correct

57. Problem55A reaction is non-spontaneous at the freezing point of water but is spontaneous at the boiling point of water then : H S+ve +ve-ve -ve-ve +ve+ve -ve

58. Problem56Monomers converted to polymer by:Hydrolysis of monomers Condensation reaction between monomers Protonation of monomers None is correct

59. Problem57Increasing order of bond strength ofa.O2b.c.d.

60. Problem58Most common oxidation states of Ce(Cerium) are : +3, +4+2, +3+2, +4+3, +5

61. Problem59Ce3+, La3+, Pm3+ and Yb3+ have ionic radii in the increasing order as : La3+ < Ce3+ < Pm3+ < Yb3+Yb3+ < Pm3+ < La3+ < Ce3+La3+ = Ce3+ < Pm3+ < Yb3+Yb3+ < Pm3+ < La3+ < Ce3+

62. Problem60pH of 0.005 M calcium acetate (pKa of CH3COOH = 4.74) is : 7.049.379.268.37

63. Problem61H2 gas is absorbed on the metal surface like tungsten. This follows ….. order reaction. Third Second Zero First

64. Problem62Rate constant k of the first order reaction when initial concentration C0 and concentration Ct at time t is given by equation kt = log C0 – log CtGraph is a straight line if we plot : t vs log C0t vs log Ctt-1vs long Ctlog C0vs log C

65. Problem63Alum is widely used to purify water since : It forms complex with clay particles It coagulates the mud particles It exchanges Ca2+ and Mg2+ ions present in hard water Its sulphate ion is water purifier

66. Problem64On vigorous oxidation by permanganate solution (CH3)2 C = CHCH2CHO gives : In the following bynzyl/ally system Decreasing order of inductive effect is : (CH3)3C - > (CH3)2CH - > CH3CH2 – CH3CH2 - >(CH3)2CH - > (CH3)3C – (CH3)2CH - > CH3CH2 - > (CH3)3C – (CH3)2C- > CH3CH2 - > (CH3)3CH –

67. Problem65In the following benzyl / allyal system R-CH=CH2 or (R is alkyl group) decreasing order of inductive effect is :a.b.c.d.

68. Problem66PCI3 and PCI5 both exist; NCI3 exists but NCI5 does not exist. It is due to: Lower electro negativity of P then NLower tendency of N to form covalent bond Availability of vacant d-obital in P but not in NStatement is itself incorrect

69. Problem67Following types of compounds (as I,II)Chain isomerism Position isomerismConformers Stereoisomerism

70. Problem68Conductivity (seimen’s S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel, then constant of proportionality is expressed in:S m mol-1S2m2mol-2S m2mol-1S2m2mol

71. Problem69A heat engine absorbs heat q1 from a source at temperature T1 and heat q2 from a source at temperature T2. work done is found to be j(q1+q2).this is in accordance with : First law of thermodynamicsSecond law of thermodynamics Joules equivalent lawNone of the above

72. Problem70Select correct statement :When a covalent bond is formed, transfer of electrons takes placePure H2O does not contain any ionA bond is formed is formed when attractive forces overcome repulsive forcesHF is less polar than HBr

73. Problem71The metallic sodium dissolves in liquid ammonia to form a deep blue coloured solution, the deep blue colour is due to formation of:Solvated electron, e(NH3)-xSolvated atomic sodium, Na(NH3)­y­­(Ma++Na)NaNH2+H2

74. Problem72Maximum dehydration takes place that of :a.b.c.d.

75. Problem73SN reaction is feasible in :a.b.c.d.

76. Problem74Oxidation number of CI in CaOCI (bleaching powder) is :Zero , since it contains Cl2-1, since it contains Cl-+1, since it contains ClO-+1 and -1 since it containsClO- and Cl-

77. Problem75Picric acid is :a.b.c.d.