1. White lead is

A. PbCO₃

B. Pb(OH)₂.2PbCO₃

C. Pb(OH)₂.Pb(CH₃COOO)₂

D. Pb(OH)₂

2. When tin is boiled with concentrated nitric acid, the compound formed is

A. stannous nitrate

B. stannic nitrate

C. m-stannic acid

D. stannic oxide

3. All the metals form oxides of the type MO except

A. copper

B. barium

C. silver

D. lead

4. The element exhibiting most stable + 2 oxidation state from among the following is

A. Sn

B. Fe

C. Pb

D. Ag

5. German silver is

A. silver made in Germany

B. an alloy of silver

C. an alloy of copper

D. a silvery white paint

6. Aluminium is obtained by

A. heating red bauxite

B. heating alumina with carbon

C. electrolysing a mixture of alumina and cryolite

D. heating alumina in H₂ atmosphere

7. Concentrated H₂SO₄ cannot be used to prepare HBr from NaBr because it

A. reduces HBr

B. reacts slowly with NaBr

C. oxidises HBr

D. disproportionates HBr

8. N₂ is diamagnetic and O₂ is paramagnetic. Both the molecules have even number of electrons (N₂ : 14; O₂ : 16). It is not true that

A. the energy of the two orbitals p _x 2p_x and p _x 2p_y in O₂ is.the same

B. there are two unpaired electrons in O₂

C. the bond order in N₂ is 3

D. the bond order in O₂ is 3

9. Heavy water

A. contains dissolved Ca²⁺ and Mg⁺ ions

B. contains dissolved Ca²⁺ ions only

C. is made up of ₁H² and ₈O¹⁶ atoms

D. is water with maximum density at 4^oC

10. It is not true that

A. phosphine is more stable than ammonia

B. phosphorus is less reactive than nitrogen

C. HNO₃ is stronger acid than HPO₃

D. Nitrogen is more electronegative than phosphorus

11. The number of electrons that are paired in an oxygen molecule is

A. 7

B. 14

C. 8

D. 16

12. Which is the correct arrangement of boiling points of the following compounds?

A. H₂O > H₂Te > H₂Se > H₂S

B. H₂O > H₂S > H₂Te > H₂Se

C. H₂O < H₂S < H₂Se < H₂Te

D. H₂O > H₂S < H₂Se > H₂Te

13. Amongst the following, the weakest base is

A. potassium hydroxide

B. sodium hydroxide

C. magnesium hydroxide

D. calcium hydroxide

14. The dissociation of water at 25^oC is 1.9 x 10 ^-6 percent and the density of water is 1.0 g cm^-3. The ionisation constant of water is

A. 3.42 x 10 ^-6

B. 2.00 x 10 ^-16

C. 3.42 x 10 ^-8

D. 1.00 x 10 ^-14

15. An aqueous solution contains the following ions: Hg₂²⁺, Hg²⁺, Pb²⁺ and Cd²⁺ . It precipitates

A. Hg₂Cl₂ and PbCl₂

B. Hg₂C1₂ only

C. PbC1₂ only

D. PbCl₂ and HgCl₂

16. Which of the following salts is most acidic in water?

A. NiCl₂

B. BeCl₂

C. FeCl₃

D. AlCl₃

17. The type of hybridisation in tetrahedral complexes of metal atoms is

A. dsp²

B. d²sp

C. sp³

D. sp²

18. Pick out the electronic configuration of the most electropositive element.

A. ns²np³

B. ns²np⁰

C. ns²np¹

D. ns²np⁴

19. The designation of the orbital with n = 3 and l = 2 is

A. 4d

B. 5d

C. 3d

D. 5s

20. CsBr crystal has bcc structure. It has an edge length of 4.3 A^o. The shortest inter Br-ions is

A. 3.72 A^o

B. 4.3 A^o

C. 1.86 A^o

D. 7.44 A^o

21. A mixture of equal volumes of H₂ and Cl₂ was exposed to ultraviolet light at constant pressure. Pick out the correct statement.

A. The volume of the gas mixture increases by a factor of 2

B. The volume of the gas mixture decreases by a factor of 2

C. The volume remains unchanged, as there is no chemical reaction

D. A chemical reaction occurs but there is no change in volume

22. Correct set of four quantum numbers for the valence electrons of rubidium (z = 37) is

A. 5, 0, 0, + 1/2

B. 5, 1, 0, + 1/2

C. 5, 1, 1, + 1/2

D. 6, 0, 0, + 1/2

23. The linear structure is assumed by

A. SnCl₂

B. NCO ^-

C. SO₂

D. NH₃

24. While P reacts with caustic soda, the products are PH₃ and NaH₂PO₂. This is an example of

A. oxidation

B. reduction

C. oxidation and reduction

D. neutralisation

25. Which of the following compounds is covalent?

A. H₂

B. CaO

C. KCl

D. Na₂S

26. The concentration of solution remains independent of temperature in

A. molarity

B. normality

C. formality

D. molality

27. Precipitation takes place when the product of concentration of ions

A. equals their solubility product

B. exceeds their solubility product

C. less than their solubility product

D. none of the above

28. Which one of the following elements has maximum electron affinity?

A. F

B. Cl

C. Br

D. I

29. Most probable velocity, average velocity, and RMS velocity are related as

A. 1 : 1.128 : 1.234

B. 1 : 1.234 : 1.128

C. 1.128 : 1 : 1.234

D. 1.128 : 1.234 : 1

30. Which of the following compounds corresponds Vant Hoff’s factor (i) to be equal to 2 for dilute solution?

A. K₂SO₄

B. Na₂SO₄

C. Sugar

D. MgSO₄

31. Amongst the following hydroxides, the one that has the lowest value of K_sp at ordinary temperature (about. 25^oC) is

A. Mg(OH)₂

B. Ca(OH)₂

C. Ba(OH)₂

D. Be(OH)₂

32. The rate of reaction between A and B increases by a factor of 100. When the concentration of A is increased 10 folds, the order of reaction with respect to A is

A. 1

B. 2

C. 3

D. 4

33. In a reversible reaction, a catalyst

A. increases the rate of forward reaction

B. increases the rate of backward reaction

C. alters the rates of both reactions equally

D. increases the rate of forward reaction more than that of backward reaction

34. The cathodic reaction in electrolysis of dil. H₂SO₄ with platinum electrode is

A. oxidation

B. reduction

C. both oxidation and reduction

D. neutralisation

35. The oxide that gives H₂O₂ on treatment with a dilute acid is

A. PbO₂

B. Na₂O₂

C. MnO₂

D. TiO₂

36. A naturally occurring substance from which a metal can be profitably extracted is called

A. mineral

B. gangue

C. ore

D. flux

37. The metallic lustre exhibited by sodium is explained by

A. diffusion of sodium ion

B. oscillation of loose electrons

C. excitation of free protons

D. existence of body centred cubic lattice

38. A pair of compounds, which cannot exist together in solution, is

A. NaHCO₃ and NaOH

B. NaHCO₃ and H₂O

C. NaHCO₃ and Na₂CO₃

D. Na₂CO₃ and NaOH

39. A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

A. sodium atoms

B. sodium hydride

C. sodium amide

D. solvated electron

40. If two compounds have the same crystal structure and analogous formulae, they are called

A. allotropes

B. isotopes

C. isomers

D. isobars

41. When Benzene diazonium chloride reacts with hypophosphorous acid, it produces

A. benzene

B. phenol

C. phenylphosphite

D. phenylphosphate

42. The reaction of aliphatic primary amine with nitrous acid in cold produces

A. nitrile

B. alcohol

C. diazonium salt

D. secondary amine

43. Ethylamine can be prepared by the action of bromine and caustic potash on

A. acetamide

B. propionamide

C. formamide

D. methyl cyanide

44. The aldol condensation of acetaldehyde results in the formation of

A. CH₃COCHOHCH₃

B. CH₃CHOHCH₂CHO

C. CH₃CH₂CHOHCHO

D. CH₃CH₂OH + CH₃COOH

45. Which compound reacts fastest with Lucas reagent at room temperature?

A. Butan-l-ol

B. Butan-2-ol

C. 2-Methyl propan-l-ol

D. 2-Methyl propan-2-ol

46. The reaction with D₂O, (CH₃)₃CMgCl produces

A. (CH₃)₃CD

B. (CH₃)₃CO

C. (CD₃)₃CD

D. (CD₃)₃COD

47. The reaction with alcoholic potash, l-chlorobutane gives

A. 1-Butene

B. 1-Butanol

C. 2-Butene

D. 2-Butanol

48. The active nitrating agent during nitration of benzene is

A. NO₃^-

B. HNO₂^-

C. NO₂^-

D. HNO₃

49. The number of sigma and pi bonds in 1-buten-3-yne are

A. 5 sigma and 5 pi

B. 7 sigma and 3 pi

C. 8 sigma and 2 pi

D. 6 sigma and 4 pi

50. The most stable carbonium ion among the cations is

A. sec-butyl

B. ter-butyl

C. n-butyl

D. none of these

51. How many optically active stereo-isomers are possible for butane-2, 3-diol?

A. 1

B. 2

C. 3

D. 4

52. B.P. and M.P. of inert gases are

A. high

B. low

C. very high

D. very low

53. [CO(NH₃)₅Br] SO₄ and [CO(NH₃)₅ SO₄] Br are examples of which type of isomerism ?

A. Linkage

B. Geometrical

C. Ionization

D. Optical

54. The valency of Cr in the complex [Cr(H₂O)₄ Cl₂] ⁺ is

A. 3

B. 1

C. 6

D. 5

55. In Nessler's reagent, the ion is

A. Hg⁺

B. Hg²⁺

C. HgI₂^{2 -}

D. HgI₄^{2 -}

56. In solid CuSO₄.5H₂O, copper is co-ordinated to

A. five water molecules

B. four water molecules

C. one sulphate ion

D. one water molecule

57. Which of the following is a weak acid?

A. HCl

B. HBr

C. HP

D. HI

58. When SO₂ is passed through acidified K₂Cr₂O₇ solution,

A. the solution turns blue

B. the solution is decolourised

C. SO₂ is reduced

D. green Cr₂(SO₄)₃ is formed

59. Which of the following has lowest boiling point?

A. H₂O

B. H₂S

C. H₂Se

D. H₂Te

60. Nitric oxide is prepared by the action of dil. HNO₃ on

A. Fe

B. Cu

C. Zn

D. Sn

61. The laughing gas is

A. nitrous oxide

B. nitric oxide

C. nitrogen trioxide

D. nitrogen pentaoxide

62. Ordinary glass is

A. sodium silicate

B. calcium silicate

C. calcium and Sodium silicate

D. copper silicate

63. The chemical name of phosgene is

A. Phosphene

B. Carbonyl chloride

C. Phosphorous oxychloride

D. Phosphorous trichloride

64. Which one of the following is strongest Lewis acid?

A. BF₃

B. BCl₃

C. BBr₃

D. BI₃

65. Three centred bond is present in

A. NH₃

B. B₂H₆

C. BCl₃

D. AlCl₃

66. Plaster of Paris is

A. CaSO₄.H₂O

B. CaSO₄.2H₂O

C. CaSO₄.1/2 H₂O

D. CaSO₄.3/2 H₂O

67. Rocky impurities present in a mineral are called

A. flux

B. gangue

C. matte

D. slag

68. Free hydrogen is found in

A. acids

B. water

C. marsh gas

D. water gas

69. When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water; the sodium ions are exchanged with

A. H⁺

B. K⁺

C. SO₄^2-

D. Mg²⁺

70. On passing 0.3 faraday of electricity through aluminium chloride, the amount of aluminium metal deposited on cathode is (Al = 27)

A. 0.27 g

B. 0.3 g

C. 2.7 g

D. 0.9 g

71. The migration of colloidal particles under influence of an electric field is known as

A. Electro-osmosis

B. Brownian movement

C. Cataphoresis

D. Dialysis

72. In a colloidal state, particle size ranges from

A. 1 to 10 A^o

B. 20 to 50 A^o

C. 10 to 1000 A^o

D. 1 to 280 A^o

73. The half-life of a first order reaction is 69.35. The value of rate constant of the reaction is

A. 1.05^-1

B. 0.15^-1

C. 0.015^-1

D. 0.0015^-1

74. Heat of neutralisation of a strong acid and strong base is always

A. 13.7 Kcal/mol

B. 9.6 Kcal/mol

C. 6 Kcal/mol

D. 11.4 Kcal/mol

75. In exothermic reactions,

A. H_R =H_P

B. H_R >H_P

C. H_R < H_P

D. None of the above

76. Which is a buffer solution?

A. CH₃COOH + CH₃COONa

B. CH₃COOH + CH₃COONH₄

C. CH₃COOH + NH₄Cl

D. NaOH + NaCl

77. The pH of 0.01 M solution of HCl is

A. 1.0

B. 2.0

C. 10.0

D. 11.0

78. In which of the following case does the reaction go fastest to completion?

A. k = 10²

B. k = 10 ^-2

C. k = 10

D. k = 1

79. What quantity of limestone (CaCO₃) on heating will give 28 kg of CaO?

A. 1000 kg

B. 56 kg

C. 44 kg

D. 50 kg

80. The percentage of oxygen in NaOH is

A. 40

B. 16

C. 18

D. 10

81. If we take 44 g of CO₂ and 14 g of N₂, what will be the mole fraction of CO₂ in the mixture?

A. 1/5

B. 1/3

C. 1/2

D. 1/4

82. The molarity of a solution of Na₂CO₃ having 5.3 g/250 ml of solution is

A. 0.2 M

B. 2 M

C. 20 M

D. 0.02 M

83. A gas is initially at 1 atm pressure. To compress it to 1/2th of its initial volume, pressure to be applied is

A. 1 atm

B. 4 atm

C. 2 atm

D. 1/4 atm

84. The value of R in calorie/degree/mole is

A. 0.0831

B. 8.31

C. 8.31 x 10⁷

D. 1.987

85. Which of the following possesses zero resistance at 0 K?

A. Conductors

B. Semi-conductors

C. Super-conductors

D. Insulators

86. CsCl has lattice of the type

A. ccp

B. fcc

C. bcc

D. hcp

87. In the reaction between sodium and chlorine to form sodium chloride,

A. sodium atom is reduced

B. sodium ion is reduced

C. chlorine atom is reduced

D. chloride ion is reduced

88. Octahedral molecular shape exists in ______ hybridisation.

A. sp³d

B. sp³d²

C. sp³d³

D. sp²d²

89. NH₃ and BF₃ form an adduct readily because they form

A. a co-ordinate bond

B. a covalent bond

C. an ionic bond

D. a hydrogen bond

90. Diagonal relationship exists between

A. Li and Mg

B. Na and Mg

C. K and Mg

D. Al and Mg

91. Which element has the highest electro-negativity?

A. F

B. He

C. Ne

D. Na

92. Loss of a -particle is equivalent to

A. loss of two neutrons only

B. loss of two protons only

C. loss of two neutrons and loss of two protons

D. none of the above

93. Stable compounds in + 1 oxidation state are formed by

A. B

B. Al

C. Ga

D. Th

94. Sodium hexametaphosphate is used as

A. a cleansing agent

B. an insecticide

C. a water softner

D. an iron exchange resin

95. The strongest acid is

A. ClO₃(OH)

B. ClO₂(OH)

C. SO(OH)₂

D. SO₂(OH)₂

96. Which one among the following pairs of ions cannot be separated by H₂S in dilute hydrochloric acid?

A. Bi³⁺, Sn⁴⁺

B. Al³⁺, Hg²⁺

C. Zn²⁺, Cu²⁺

D. Ni²⁺, Cu²⁺

97. The alkane would have only the primary and tertiary carbon is

A. Pentane

B. 2-methylbutane

C. 2, 2-dimethylpropane

D. 2, 3-dimethylbutane

98. The product of reaction of alcoholic silver nitrite with ethy1 bromide is

A. ethane

B. ethene

C. nitroethane

D. ethyl a1coho1

99. Formy1 chloride has not been so prepared. Which one of the following can function as formyl chloride in formulation?

A. HCHO + HCl

B. HCOOCH₃ + HCl

C. CO + HCl

D. HCONH₂ + HCl

100. Amongst the following, the most basic compound is

A. Benzylarnine

B. Aniline

C. Acetanilide

D. p-Nitroaniline