1. UPSEE–PAST PAPERS
CHEMISTRY- UNSOLVED PAPER - 1998

2. SECTION – I
 Single Correct Answer Type
 There are five parts in this question. Four choices are given for each part and one of them is
correct. Indicate you choice of the correct answer for each part in your answer-book by
writing the letter (a), (b), (c) or (d) whichever is appropriate

3. 01 Problem
Which one of the following does not have any unit ?
a. Electron affinity
b. Ionisation energy
c. Electronegativity
d. None of the above

4. 02 Problem
The oxidation number of O in H2O2 is :
a. - 2
b. - 1
c. + 1
d. + 2

5. 03 Problem
The product CH3 – CH = CH2 + HBr X is :
CH3 – CH2 – CH2Br
CH3 – CHBr – CH3
CH2Br – CH = CH2
CH2 = C = CH2

6. 04 Problem
German silver is a alloy of copper and :
a. Zn and Ni
b. Al
c. Zn
d. Sn

7. 05 Problem
The formula of haematite is :
a. Fe3O4
b. Fe2O3
c. FeCO3
d. FeS2

8. 06 Problem
Which one of the following is a Lewis acid ?
a. PCl3
b. AlCl3
c. NCl3
d. AsCl3

9. 07 Problem
Copper sulphate solution reacts with KCN to give :
a. Cu(CN)2
b. CuCN
c. K4[Cu(CN)4]
d. K3[Cu(CN)4]

10. 08 Problem
Finely divided iron combine with Co to give :
a. Fe(CO)5
b. Fe(CO)3
c. Fe(CO)18
d. Fe(CO)6

11. 09 Problem
The molecule with pyramidal shape is :
a. PCl3
b. SO3
c. CO32-
d. NO3-

12. 10 Problem
Bakelite is obtained from phenol by reacting with :
a. Acetaldehyde
b. Acetal
c. Formaldehyde
d. Chlorobenzene

13. 11 Problem
The aldol condensation acetaldehyde results in the :

14. 12 Problem
Benzyl alcohol is obtained from benzaldehyde by :
a. Wurtz reaction
b. Cannizaro reaction
c. Claisen reaction
d. Perkin reaction

15. 13 Problem
Which of the following compounds can exist in optically active form ?
a. 1-butanol
b. 2-butanol
c. 3-pentanol
d. 4-heptanol

16. 14 Problem
The oxidation number of Pt in [Pt(C2H4)Cl3]- is
a. +1
b. +2
c. +3
d. +4

17. 15 Problem
The IUPAC name of
a. 1, 1 – dimethyl-1, 3-butanediol
b. 4-methyl-2, 4-pentanediol
c. 2-methyl-2, 4-pentanediol
d. 1, 3, 3-trimethyl-1, 3-propendiol

18. 16 Problem
How many isomers are possible for pentane ?
a. 4
b. 5
c. 6
d. 3

19. 17 Problem
The number of particles emitted in the nuclear reaction,
228→ 212
90Th 83Bi
a. 4 α and 1 β
b. 3 α and 7 β
c. 8 αand 1 β
d. 4 α and 7 β

20. 18 Problem
The pH of a 10-10 M NaOH solution is nearest to :
a. 10
b. 7
c. 4
d. - 10

21. 19 Problem
Which of the following compound is not sp3 hybridised ?
a. NH3
b. SO3-2
c. C(C6H5)3-
d. SF4

22. 20 Problem
The molecule which does not exhibit dipole moment is ;
a. NH3
b. CHCl3
c. H2O
d. CCl4

23. 21 Problem
238
92U emits -particle, the product has mass number and atomic number :
a. 236, 92
b. 234, 90
c. 238, 92
d. 236, 90

24. 22 Problem
What is the half-life of 6C14, if its disintegration constant is 2.31 x 10-4 yr-1 ?
a. 0.3 x 104 yr
b. 0.3 x 103 yr
c. 0.3 x 108 yr
d. 0.3 x 102 yr

25. 23 Problem
Gamma rays are :
a. High energy electrons
b. Low energy electrons
c. High energy electromagnetic waves
d. High energy positrons

26. 24 Problem
The compound which contain both ionic and covalent bond, is :
a. CH4
b. H2
c. KCN
d. KCl

27. 25 Problem
The pH of a 10-8 M solution of HCl in water is :
a. 8
b. -8
c. between 7 and 8
d. between 6 and 7

28. 26 Problem
Which one of the following contains a co-ordinate bond ?
a. BaCl2
b. CsCl
c. H2O
d. N2H5 +

29. 27 Problem
The C – H bond distance is the largest in :
a. C2H2
b. C2H4
c. C2H4Br2
d. C6H6

30. 28 Problem
The oxidation number of carbon in CH2O is :
a. - 2
b. + 2
c. zero
d. + 4

31. 29 Problem
A p-orbital can accommodate :
a. 4 electrons
b. 6 electrons
c. 2 electrons with parallel atoms
d. 2 electrons with opposite spins

32. 30 Problem
Heavy water is used in atomic reactor as :
a. Coolant
b. Moderator
c. Both coolant and moderator
d. Neither coolant nor moderator

33. 31 Problem
Aniline is separated from a mixture by :
a. Fractional crystallization
b. Fractional distillation
c. Vacuum distillation
d. Steam distillation

34. 32 Problem
The oxidation number of oxygen in potassium super oxide KO2 is :
a. - 2
b. - 1
c. - 1/2
d. - 1/4

35. 33 Problem
The element californium belongs to the family of :
a. Actinide series
b. Alkali metal family
c. Alkaline earth family
d. Lanthanide series

36. 34 Problem
A compound contains two dissimilar asymmetric carbon atoms. The number of
optical isomers is :
a. 2
b. 3
c. 5
d. 4

37. 35 Problem
The number of unpaired electrons in carbon atom is :
a. 1
b. 2
c. 3
d. 4

38. 36 Problem
The maximum extent of H-bonding is shown by :
a. H2O
b. HF
c. H2S
d. H2Se

39. 37 Problem
The catalyst used in hydrogenation of oil is :
a. V2O5
b. Fe
c. Ni
d. Pt

40. 38 Problem
The IUPAC name of CH3OC2H5 is :
a. 1-ethoxy methane
b. 1-methoxy ethane
c. methyl ethyl ether
d. ethyl methyl ether

41. 39 Problem
Chloroform can be obtained from :
a. Methanol
b. Methanal
c. Propanol-1
d. Propanol-2

42. 40 Problem
Alkaline hydrolysis of ester is called :
a. Neutralisation
b. Esterification
c. Polymerization
d. Saponification

43. 41 Problem
Cinnabar is the ore of :
a. Mercury
b. Copper
c. Zinc
d. Lead

44. 42 Problem
The magnetic quantum number is related to :
a. Size
b. Shape
c. Orientation
d. Spin

45. 43 Problem
Mohr’s, slat is :
a. Normal salt
b. Acid salt
c. Basic salt
d. Double salt

46. 44 Problem
Which of the following metal carbonates is decomposed on heating ?
a. MgCO3
b. Na2CO3
c. K2CO3
d. Rb2CO3

47. 45 Problem
Which one of the following has the smallest radius ?
a. O2-
b. F-
c. Li+
d. Be2+

48. 46 Problem
Brass in an alloy containing :
a. Zn + Cu
b. Cu + Sn
c. Zn + Sn
d. Cu + Zn + Sn

49. 47 Problem
Red lead is :
a. PbO
b. Pb2O
c. Pb2O3
d. Pb3O4

50. 48 Problem
Calcium acetate on dry distillation give :
a. Acetic anhydride
b. Acetone
c. Acetaldehyde
d. Ethyl alcohol

51. 49 Problem
In Ni(CO)4 the oxidation state of Ni is :
a. 0
b. 4
c. 8
d. 2

52. 50 Problem
For the reaction 2NH3(g)  N2(g) + 3H2(g), the unit of Kp will be :
a. [atm]
b. [atm]3
c. [atm]-2
d. [atm]2

53. 51 Problem
Which one of the following is not a colligative property ?
a. Tf
b. π
c. Tb
d.kb

54. 52 Problem
The equilibrium constant for the reaction SO2(g) + 1/2O2(g)  SO3(g) and
2SO3(g)  2SO2 (g) + O2(g) are K1 and K2 respectively then :
a. K2 = K1
b. K2 = K12
c. K2 = 1/K1
d. K2 = 1/K12

55. 53 Problem
Iodine is formed when KI reacts with a solution of :
a. ZnSO4
b. CuSO4
c. FeSO4
d. (NH4)2SO4

56. 54 Problem
The metal oxide which decomposes on heating is :
a. ZnO
b. Al2O3
c. CuO
d. HgO

57. 55 Problem
Which one is not an ore of aluminium ?
a. Anhydrite
b. Bauxite
c. Corundum
d. Cryolite

58. 56 Problem
Calculate the solubility of AgCl in mol/L if the solubility product constant for AgCl
is 1 x 10-10 :
a. 10-5
b. 10-10
c. 10-8
d. 10-7

59. 57 Problem
The standard reduction potentials for Fe2+ | Fe and Sn2+ | Sn electrode are - 0.44
V and - 0.14 V respectively. The standard emf of the cell with reaction Fe2+ + Sn
Fe + Sn2+ is
a. + 0.30 V
b. - 0. 30 V
c. + 0.58 V
d. - 0.58 V

60. 58 Problem
The effect of catalyst in a chemical reaction is to change :
a. Heat of reaction
b. Activation energy required for the reaction
c. Equilibrium constant
d. Internal energy of the reactants

61. 59 Problem
Which one of the following sterilizes the water ?
a. CO2
b. O2
c. O3
d. SO3

62. 60 Problem
The oxidation state of Mo in Mo2Cl84- is :
a. + 4
b. - 4
c. + 1
d. + 2

63. 61 Problem
Which one is the correct name of the compound ?
a. 3-isopropyl-2-methyl pentane
b. 3-ethyl-2,4-dimethyl pentane
c. 2, 4-dimethyl-3-ethyl pentane
d. none of the above

64. 62 Problem
The product of the following reaction is :

65. 63 Problem
The number of possible enantiomeric pairs that can be produced during mono
chlorination of 2-methyl butane is :
a. 2
b. 3
c. 1
d. 4

66. 64 Problem
Lewisite is :
CHCl
a. ||
CHAsCl3
CHCl
b. ||
CHAsCl4
CHCl
||
c. CHAsCl
2
CCl2
d.
||
CHAsCl2

67. 65 Problem
Which of the following reactions will yield 2, 2-dibromopropane ?
a. HC CH + 2HBr→
b. CH3 – C CH + 2HBr →
c. CH3 – CH = CH2 + HBr →
d. CH3 – CH = CHCH3 + Br →

68. 66 Problem
Adding Cl2 in benzene in the presence of Fe is an example of :
a. Addition
b. Halogenation
c. Substitution
d. Elimination

69. 67 Problem
The major product of nitration of benzoic acid is :
a. 3-nitrobenzoci acid
b. 2, 4-nitro benzoic acid
c. 4-nitro benzoic acid
d. 2-nitro benzoic acid

70. 68 Problem
What is obtained when toluene reacts with chlorine in the presence of light ?
a. Benzyl chloride
b. Chlorobenzene
c. Both (a) and (b)
d. None of these

71. 69 Problem
SN1 reaction of favoured by :
a. Crowding at the alpha C-atom
b. Non-polar solvents
c. Small group on the carbon attached to the halogen atom
d. All of the above

72. 70 Problem
A compound is soluble in conc. H2SO4. It does not decolouries bromine in CCl4
but is oxidized by chromic anhydride in aqueous H2SO4 within 2 seconds, turning
orange solution to blue green and then opaque. The original solution contain :
a. An alkene
b. An ether
c. A secondary alcohol
d. A primary alcohol

73. 71 Problem
NaOH CO2 HCl
X Y Z
The end product in the reaction : C6H5OH 1400 C
a. Benzoic acid
b. Salicylaldehyde
c. Chlorobenzene
d. Salicylic acid

74. 72 Problem
Propionic acid is subjected to reduction with HI in the presence of little P, the
product formed is :
a. Propane
b. Butane
c. Ethane
d. Methane

75. 73 Problem
Butyne-2 contains :
a. sp-hybridised carbon atoms only
b. sp3- hybridized carbon atoms only
c. both sp2-and sp3-hybridised carbon atoms
d. both sp and sp3-hybridised carbon atoms

76. 74 Problem
The empirical formula of a compound is CH2. One mole of this compound has a
mass of 42 g. Its molecular formula is :
a. C2H4
b. CH4
c. C3H6
d. C5H12

77. 75 Problem
The number of isomers of C6H14 is :
a. 4
b. 6
c. 5
d. 7

78. Part II

79. 76 Problem
How will you convert ?
a. Ethyl alocohol to vinyl acetate
b. Tolune to p-nitrobenzyl ethyl ether

80. 77 Problem
The vapour density [Hydrogen = 1] of a mixture containing NO2 and N2O4 is 38.3
at 270C. Calculate the number of moles of NO2 in 100 g of the mixture.

81. 78 Problem
Give reasons for the following :
a. PF5 is known but NF5 is not .
b. Formic acid is a stronger acid then acetic acid.
c. Hydrazones of acetaldehyde and acetone are not prepared in highly acidic
medium.
d. Boiling point of hydrogen chloride is lower than that of hydrogen fluoride.

82. 79 Problem
How will you bring about the following transformations ?

83. 80 Problem
Calculate the simultaneous solubility of AgSCN and AgBr. Ksp for AgSCN and AgBr
are 1.0 x 10-12 and 1.0 x 10-13 respectively

84. 81 Problem
Arrange the following as indicated :
a. n-butane, ethanol, water propane in order of increasing boiling point.
b. Aniline, ethylamine, ethane, phenol in order of increasing base strength.
c. HCHO, CH3COCH3,CH3CHO, C2H5COCH3 in order of increasing reactivity
towards HCN.
d. Arrange the following according to the instructions given against each.
I. Na, Al, Fe, Pb, N (increasing density).
II. Ca, Al, O, N (increasing para magnetism).
a. 0.2 M NaOH, 0.2 M Na2CO3, 0.1 M AgNO3, 0.1 M FeSO4(NH4)2SO4.6H2O in
order of increasing freezing point.

85. 82 Problem
a. What do you understand by electrovalency ? Describe the characteristics of
electrovalent compounds.
b. Show the electronic configuration of the following compounds.
a. HCl
b. CH4
c. H2S
d. H2O

86. 83 Problem
a. Why is there no 2d or 3f orbital ?
b. Deduce the possible sets of four quantum numbers when n = 2

87. 84 Problem
How will you convert ?
a. Methanal to ethanal
b. Acetic acid to acetone
c. Acetaldehyde to ethylene
d. Benzene to benzoic acid
e. Ethanal to chloroform

88. 85 Problem
How many moles of each of the following will be present in 20 g ?
a. C6H12O6
b. CH3OH
c. CH3COOH
d. C2H5OH
e. C12H22O11

89. 86 Problem
The molal elevation constant for water is 0.560 per kg of water. Calculate the
boiling point of solution made by dissolving 6.0 g of urea (NH2CONH2)in 200 g of
water.

90. 87 Problem
Calculate the normality of resulting solution made by adding 2 drops (0.1 mL) of
0.1 N H2SO4 in 0.1 L of distilled water.

91. 88 Problem
Compute the solubility of AgCl in mol/L, if the solubility product constant for AgCl
is 1 x 10-10

92. 89 Problem
Match the following :
1. Arrhenius a . NH4+
2. Ostwald b. NH4OH + NH4Cl
3. Bronsted acid c. pH scale
4. Buffer solution d. BF3
5. Lewis acid e. Ionic theory
6. Sorensen f. Dilution law

93. 90 Problem
What happens when :
a. Acetylene is passed through an aqueous solution containing H+ and Hg2+ ions.
b. Ethene mixed with air is passed under pressure over a silver catalyst at 2500C.
c. Acetaldehyde is warmed with strong aqueous alkali solution.
d. Ethanal is heated with excess of conc. H2SO4 at about 1600C.
e. Anhydrous calcium acetate is heated.

94. 91 Problem
Fill in the blanks :
a. Pure chloroform is obtained by heating ……… with aqueous solution of NaOH.
b. CO combines with hydrogen when heated to 350 – 3450C in presence of ZnO
+ Cr2O3 under pressure to give ……..
c. Excess NaOH reacts with Zn to for m………..
d. Potash alum is represented by the formula ……….

95. 92 Problem
Write down five reactions, when hydrogen peroxide is used as reducing agent.

96. 93 Problem
Complete and balance the following equation :
a. HCl + MnO2 H2O + MnCl2 + …..
b. H2SO4 + HI …… + …..
c. P4 + I2 + H2O + H2O2 K2SO4 + MnSO4 + H2O + ……
d. Al4C3 + H2O …….. + ……..

97. 94 Problem
Name one method used for the manufacture of :
a. Nitric acid
b. Sulphuric acid
c. Soda ash
d. Vanaspati ghee

98. 95 Problem
Calculate the weight of methane in a 9.0 L cylinder at 16 atm and 270C. R = 0.08 L
atm K-1 mol-1]

99. 96 Problem
Give IUPAC name for the following :
(a) t-butyl alcohol

100. 97 Problem
Write the Lewis structure of the following by indicating bonded electron pair with
dash ( -) and non-bonded electrons or electron pairs with dot (.).
a. Dinbitrotetra oxide (N2O4)
b. Phosphorus acid (H3PO4)
c. Carbonate ion (CO32-)
d. Carbon disulphide (CS2)

101. 98 Problem
Complete and balance the following equations :
a. Cu2+ I- Cu+ + I2
b. Fe2+ + MnO4- Fe2+ + Mn2+

102. 99 Problem
State whether true or false, give one or two sentences in reasoning.
a. The rate of diffusion of a gas is inversely proportional to its density.
b. An aqueous solution of AlCl3 is acidic.
c. Sulphur reduces hot nitric acid into NO2.
d. Zinc hydroxide dissolves in excess of NaOH solution on evolve dihydrogen gas.

103. 100 Problem
Give one example of each of the following :
a. Perkin reaction
b. Aldol condensation
c. Claisen condensation
d. Electrophilic substance
e. Nucleophilic substance

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