1. UPSEE–PAST PAPERS
CHEMISTRY- UNSOLVED PAPER - 2000

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
One would expect proton to have very large :
a. Ionization potential
b. Radius
c. Charge
d. Hydration energy

4. 02 Problem
The mass of 1 mol of electrons is :
a. 9.1 x 10-28 g
b. 1.008 mg
c. 0.55 mg
d. 9.1 x 10-27 g

5. 03 Problem
The C14 to C12 ratio in a wooden article is 13% that of the fresh wood. Calculate
the age of the wooden article. Given that the half-life of C14 is 5770 yr :
a. 16988 yr
b. 16858 yr
c. 15675 yr
d. 17700 yr

6. 04 Problem
The number of neutrons in the parent nucleus which gives N14 on emission is :
a. 7
b. 14
c. 6
d. 8

7. 05 Problem
A reversible chemical reaction is having two reactants, in equilibrium. If the
concentration of the reactants are doubled then the equilibrium constant will :
a. Be doubled
b. Become one fourth
c. Be halved
d. Remain the same

8. 06 Problem
Amongst LiCl, RbCl, BeCl2 and MgCl2, the compounds with the greatest and least
ionic character respectively are :
a. LiCl and RbCl
b. MgCl2 and BeCl2
c. RBCl and BeCl2
d. RbCl and MgCl2

9. 07 Problem
In which of the following compounds carbon atom undergoes hybridization of
more than on type (sp, sp2 and sp3) ?
(i) CH3 – CH2 – CH2 – CH3
(ii)CH3 – CH = CH – CH3
(iii)CH2 = CH – CH2 – CH3
(iv) H – C C – H
a. (iii) and (iv)
b. (i) and (iv)
c. (ii) and (iii)
d. only (i)

10. 08 Problem
This low density of ice compared to water is due to :
a. Induced dipole-induced dipole interactions
b. Dipole-induced dipole interactions
c. Hydrogen bonding interactions
d. Dipole-dipole interactions

11. 09 Problem
The bond order of in N2+ is :
a. 1.5
b. 3.0
c. 2.5
d. 2.0

12. 10 Problem
The oxidation number of N in NH3 is :
a. + 3
b. + 5
c. - 3
d. 0

13. 11 Problem
Which one of the following reactions involves oxidation-reaction ?
a. H2 + Br2 →2HBr
b. NaBr + HCl → NaCl + HBr
c. HBr + AgNO3 → AgBr + HBr
d. 2NaOH + H2SO4 → Na2SO4 + 2H2O

14. 12 Problem
For the electrochemical cell, M |M+||X-|X, E0 (M+ M) = 0.44 V, E0 (X | X-) = 0.33 V
From this data, one can deduce that :
0
a. E cell = -0.77V
b. M+ + X - M + X is the spontaneous reaction
c. M + X M+ + X – is the spontaneous reaction
0
d. E cell - 0.77 V

15. 13 Problem
What is the molarity of 0.2 N Na2CO3 solution ?
a. 0.1 M
b. 0 M
c. 0.4 M
d. 0.2 M

16. 14 Problem
For the reversible reaction N2(g) + 3H2(g) 2NH3(g) at 5000C, the value of Kp is 1.44
x 10-5 when partial pressure is measured in atmospheres. The corresponding
value of Kc with concentration in mol/L is :
a. 1.44 x 10-5 / (0.82 x 773)-3
b. 1.44 x 10-5 / (0.082 x 500)-2
c. 1.44 x 10-5 / (8.314 x 773)2
d. 1.44 x 10-5 / (0.082 x 773)-2

17. 15 Problem
One litre oxygen gas a STP will weight :
a. 1.43 g
b. 2.24 g
c. 11.2 g
d. 22.4 g

18. 16 Problem
Rate of a reaction :
a. Decreases with increase in temperature
b. Increases with increase in temperature
c. May increase or decreases with increases in temperature
d. Does not depend on temperature

19. 17 Problem
The rate constant for the reaction 2N2O5 4NO2 + O2 is 3.0 x 10-5 s-1. If the rate
is 1.4 x 10-5 mol L-1 s-1, then the concentration of N2O5 (in mol L-1) is :
a. 0.04
b. 0.8
c. 0.07
d. 0.4

20. 18 Problem
A catalyst is a substance which :
a. Is always in the same phase as in the reactions
b. Alters the equilibrium in a reaction
c. Does not participate in the reaction but alters the rate of reaction
d. Participates in the reaction and provide an easier pathway for the same

21. 19 Problem
The relationship between the values of osmotic pressure of 0.1 M
solutions of KNO3 (P1) is :
P1 P2
a.
P1 P2 P1 P2
b. P1 > P2
c. P2 > P1
d. P1 = P2

22. 20 Problem
An aqueous solution of glucose is 10% in strength. The volume in which 1 g-mol
of it is dissolved, will be :
a. 9 L
b. 1.8 L
c. 8 L
d. 0.9 L

23. 21 Problem
The strongest Bronsted base is :
a. ClO 3
b. ClO 2
c. ClO 4
d. ClO-

24. 22 Problem
A solution contains 10 mL 0.1 NaOH and 10 mL 0.05 N H2SO4, pH of this solution
is :
a. Less than 7
b. 7
c. zero
d. greater than 7

25. 23 Problem
A saturated solution of Ag2SO4 is 2.5 x 10-2 M; The value of its solubility product is
:
a. 62. 5 x 10-6
b. 6.25 x 10-4
c. 15.625 x 10-6
d. 3.125 x 10-6

26. 24 Problem
What is the freezing point of a solution containing 8.1 g HBr in 100 g water
assuming the acid to be 90% ionized ? (kf for water = 1.86 K mol-1) :
a. 0.850C
b. - 3.530C
c. 00C
d. - 0.350C

27. 25 Problem
The pH value for 1/1000 N-KOH solution is :
a. 3
b. 10-11
c. 2
d. 11

28. 26 Problem
The pH of 0.1 M solution of the following salts increases in the order :
a. NaCl < NH4Cl < NaCN < HCl
b. HCl < NH4Cl < NaCl < NaCN
c. NaCN < NH4Cl < NaCl < HCl
d. HCl < NaCl < NaCN < NH4Cl

29. 27 Problem
Energy required to dissociate 4 g of gaseous hydrogen into free gaseous atoms is
208 kcal at 250C. The bond energy of H – H will be :
a. 104 kcal
b. 52 kcal
c. 10.4 kcal
d. 1040 kcal

30. 28 Problem
Which one of the following will have highest coagulating power for As2S3 colloid ?
a. Al3+
3
b. PO 4
2
c. SO 4
d. Na+

31. 29 Problem
The density of gold is 19 g/cm3. If 1.9 x 10-4 g of gold is dispersed in one litre of
water to give a sol having spherical gold particles of radius 10 nm, then the
number of gold particles per mm3 of the sol will be :
a. 1.9 x 1012
b. 6.3 x 1014
c. 6. 3 x 1010
d. 2. 4x 106

32. 30 Problem
Most acidic oxide is :
a. Na2O
b. ZnO
c. MgO
d. P2O5

33. 31 Problem
Which element forms maximum compound in chemistry ?
a. O
b. H
c. Si
d. C

34. 32 Problem
The correct order of acidic strength :
a. Cl2O7 > SO2 > P4O10
b. K2 > CaO > MgO
c. CO2 > N2O5 > SO3
d. Na2O > MgO > Al2O3

35. 33 Problem
The volume strength of 1.5 N H2O2 solution is :
a. 8.4
b. 8.0
c. 4.8
d. 3.0

36. 34 Problem
Black jack is an ore of :
a. Cr
b. Sn
c. Zn
d. Ni

37. 35 Problem
Thermite is a mixture of :
a. Cr2O3 + Al2O3
b. Fe2O3 + Al
c. Fe2O3 + Al2O3
d. Al2O3 + 2Cr

38. 36 Problem
Flux is used to :
a. Remove silica
b. Remove silica and undesirable metal oxide
c. Remove all impurities from ores
d. Reduce metal oxide

39. 37 Problem
Which group is called buffer group of the periodic table ?
a. I
b. VII
c. VIII
d. Zero

40. 38 Problem
Brass is an alloy of :
a. Zn and Sn
b. Zn and Cu
c. Cu, Zn and Sn
d. Cu and Sn

41. 39 Problem
Microcosmic salt is :
a. Na (NH4) . H2O
b. Na(NH3) . HPO4 . 4H2O
c. Na(NH4) . HPO4 . 4H2O
d. K(NH3) . HPO4 . 4H2O

42. 40 Problem
The decomposition temperature is maximum for :
a. SrCO3
b. CaCO3
c. MgCO3
d. BaCO3

43. 41 Problem
Inorganic benzene is :
a. B3H3N3
b. BH3NH3
c. B3H6N3
d. H3B3N6

44. 42 Problem
Green house effect is caused by :
a. NO2
b. CO
c. NO
d. CO2

45. 43 Problem
The most abundant metal in the earth crust is :
a. Al
b. Ca
c. Fe
d. Na

46. 44 Problem
Bond energies in NO, NO+ and NO- are such as :
a. NO - > NO > NO+
b. NO > NO- NO +
c. NO+ > NO > NO-
d. NO+ > NO- > NO

47. 45 Problem
Iodine is formed when KI reacts with a solution of :
a. CuSO4
b. (NH4)2SO4
c. ZnSO4
d. FeSO4

48. 46 Problem
Rust is :
a. FeO + Fe(OH)2
b. Fe2O3
c. Fe2O3 + Fe(OH)2
d. Fe2O3 and Fe(OH)3

49. 47 Problem
The electronic configuration of element with atomic number 24 is :
a. 1s2, 2s22p6, 3s23p6 3d4, 4s2
b. 1s2, 2s22p6, 3s23p6 3d10
c. 1s2, 2s22p6, 3s23p6 3d6
d. 1s2, 2s22p6, 3s23p6 3d5, 4s1

50. 48 Problem
Ziegler-Natta catalyst is :
a. (Ph3P)3 RhCl
b. K[PtCl3(C2H4)]
c. [Al2(C2H6)6 + TiCl4]
d. [Fe(C2H5)2]

51. 49 Problem
For gold plating, the electrolyte used is :
a. AuCl3
b. HAuCl4
c. K[Au(CN)2]
d. None of the above

52. 50 Problem
[Sc(H2O)6]3+ ion is :
a. colourless and diamagnetic
b. coloured and octahedral
c. colourless and paramagnetic
d. coloured and paramagnetic

53. 51 Problem
An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour
density is 73 Molecular formula of the compound is :
a. C3H5O2
b. C4H10O2
c. C6H10O4
d. C3H10O2

54. 52 Problem
How many isomers can be obtained from C6H14 ?
a. 7
b. 5
c. 3
d. 6

55. 53 Problem
The IUPAC name of CH3 – C C – CH (CH3)2 is :
a. 4-methyl-2-pentyne
b. 4, 4-dimethyl-2-butyne
c. methyl isopropyl acetylene
d. 2-methyl-4-pentyne

56. 54 Problem
The total number of acyclic isomers including the stereoisomers with the
molecular formula C4H7Cl :
a. 11
b. 12
c. 9
d. 10

57. 55 Problem
The IUPAC name of
a. 1, 1-dimethyl-1, 3-butanediol
b. 2, methyl-2, 4-pentanediol
c. 4-methyl-2, 4-pentanediol
d. 1, 3, 3-trimethyl-1, 3-propane diol

58. 56 Problem
The number of possible enantiomeric pairs that can be produced during mono-
chlorination of 2-methylburane is :
a. 3
b. 4
c. 1
d. 2

59. 57 Problem
Most stable carbonium ion is :
a. 2 H5
b. (CH3)3
c. (C6H5)3
d. C6H5 H2

60. 58 Problem
Which one of the following possess highest m.p. ?
a. Chlorobenzene
b. o-dichlorobenzene
c. m-dichlorobenzene
d. p-dichlorobenzene

61. 59 Problem
Dehydration of 2-butanol yield :
a. 1-butene
b. 2-butene
c. 2-butyne
d. both a and b

62. 60 Problem
Ethylene di bromide on heating with metallic sodium in ether solution yields :
a. Ethane
b. Ethyene
c. 2-butyne
d. 1-butene

63. 61 Problem
Which of the following is the best to change glycerol to acrolein ?
a. P2O5
b. Conc. H2SO4
c. Anhydrous CaCl2
d. KHSO4

64. 62 Problem
Which one of the following will most readily be dehydrated in acidic conditions ?
a.
b.
c.
d.

65. 63 Problem
Cannizaro reaction does not occurs with :
a. CH3- CH2OH
b. C6H5CHO
c. CH3CHO
d. CH3 – CO – CH3

66. 64 Problem
Which of the following gases does not form a ketone on treatment with dil. H2SO4
and 1% HgSO4 ?
a. C2H6
b. C2H2
c. C3H4
d. All of these

67. 65 Problem
Urea is :
a. diacidic base
b. neutral
c. monoacidic base
d. amphoteric

68. 66 Problem
The acids which do not contain – COOH group is :
a. ethanoic acid
b. picric acid
c. lactic acid
d. plamitic acid

69. 67 Problem
Uroptopine is obtained by the reaction of ammonia with :
a. CH3Cl
b. HCHO
c. NH2CONH2
d. CH3CHO

70. 68 Problem
Strongest acid among the following is :
a. CF3COOH
b. CBr3COOH
c. CH3COOH
d. CCl3COOH

71. 69 Problem
Which amino acid is achiral ?
a. Alanine
b. Histidine
c. Proline
d. None of these

72. 70 Problem
Hydrolysis of urea yields :
a. NH3
b. H2O
c. CO2
d. All of these

73. 71 Problem
Saccharin is a/an :
a. Aliphatic hydrocarbon
b. Polynuclear compound
c. Sweetening agent
d. Sugar

74. 72 Problem
Product of the reaction between C6H5NH2,CHCl3 and KOH are :
a. C6H5CN + KCl
b. C6H5NC + KCl
c. C6H5Cl + NH4Cl + KCl + H2O
d. C6H5OH + NH4OH + KCl

75. 73 Problem
Peptides on hydrolysis give :
a. Ammonia
b. Amino acid
c. Alcohol
d. Urea

76. 74 Problem
Gasoline is a mixture of :
a. Ammonia
b. amino acid
c. alcohol
d. urea

77. 75 Problem
In mixture of iso-octane and n-heptane the percentage of heptane is 11, the
octane number of this fuel is :
a. 89
b. 10
c. 100
d. 80

78. 76 Problem
Aniline is separated from a mixture by :
a. Fractional crystallization
b. Fractional distillation
c. Vacuum distillation
d. Steam distillation

79. 77 Problem
Calcium acetate on heating gives :
a. Acetic anhydride
b. Acetone
c. Acetaldehyde
d. Ethyl alcohol

80. 78 Problem
The ratio of to bonds in benzene is :
a. 2
b. 3
c. 4
d. 8

81. 79 Problem
When chloroform is left open in light and air, it forms :
a. Phosgene
b. Formic acid
c. Phosphene
d. Carbon tetra chloride

82. 80 Problem
The reaction of lucas reagent is the fastest with :
a. (CH3)2CHOH
b. CH3(CH2)OH
c. CH3CH2OH
d. (CH3)3COH

83. 81 Problem
In an alkaline medium acetaldehyde undergoes :
a. Benzoin condensation
b. Aldol condensation
c. Polymerization
d. Cannizaro reaction

84. 82 Problem
Complete combustion of CH4 gives :
a. CO2 + H2O
b. CO2 + H2
c. COCl2
d. CO + CO2 + H2O

85. 83 Problem
CH2 = CH2 is :
a. Polymer
b. Isomer
c. Monomer
d. Epimer

86. 84 Problem
The most reactive hydrocarbon is :
a. Ethane
b. Methane
c. Acetylene
d. Ethylene

87. 85 Problem
Metal present in vitamin B12 is :
a. Co
b. Mg
c. Fe
d. Ca

88. 86 Problem
Which one of the following is coinage metal ?
a. Zn
b. Cu
c. Sn
d. Pb

89. 87 Problem
Producer gas is the mixture of :
a. CO + N2
b. CO + H2
c. CO + Water vapor
d. N2 + CH4

90. 88 Problem
Plaster of Paris is :
a. CaSO4 . 2H2O
b. CaSO4 . H2O
c. CaSO4 . H2O
d. CaSO4 . 4H2O

91. 89 Problem
Setting of cement is an :
a. Exothermic reaction
b. Endothermic reaction
c. Neither endothermic nor exothermic
d. Example of neutralization reaction

92. 90 Problem
How many moles of helium gas occupy 22.4 L at 00C and 1 atm pressure ?
a. 0.11
b. 1.11
c. 0.90
d. 1.0

93. 91 Problem
Which has highest weight ?
a. 1 m3 of water
b. A normal adult man
c. 10 L of Hg
d. All have same weight

94. 92 Problem
Conc. HNO3 reacts with I2 to form :
a. HI
b. HOI
c. HIO2
d. HIO3

95. 93 Problem
For which one of the following reactions Kp = Kc ?
a. PCl5  PCl3 + Cl2
b. N2 + O2 2NO
c. N2 + 3H2  2NH3
d. 2SO3  2SO2 + O2

96. 94 Problem
The orbital angular momentum of an electron is 2 s orbital is :
a. Zero
h
b. 2
2
h
c.
2
1 h
d. 22

97. 95 Problem
The order of a reaction with rate equal to kC A / 2CB1 / 2 is :
3
a. 1
1
b. 2
3
c. 2
d. 2

98. 96 Problem
Coal gas is a mixture of :
a. H2O and CO
b. H2, CO and CH4
c. H2 and CO
d. CH4 and CO

99. 97 Problem
Nitration of toluene using fuming sulphuric and nitric acid gives :
a. p-nitrotoluene
b. o-nitrotoluene
c. m-nitrotoluene
d. tri-nitrotoluene

100. 98 Problem
Volume of 0.6 M NaOH required to neutrlise 30 cm3 of 0.4 M HCl is :
a. 30 cm3
b. 45 cm3
c. 20 cm3
d. 50 cm3

101. 99 Problem
The heat of neutralization is highest for the reaction between :
a. NH4OH – CH3COOH
b. HNO3 – NH4OH
c. NaOH- CH3COOH
d. HCl – NaOH

102. 100 Problem
The product of reaction between alcoholic silver nitrite with ethyl bromide is :
a. Ethane
b. Ethane
c. Ethyl nitrile
d. Nitro ethane

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