1. Which of the following is not a Lewis acid?

A. BF₃

B. AlCl₃

C. SnCl₄

D. CCl₄

2. Equal weights of methane and oxygen are mixed in an empty container at 25°C. The fraction of total pressure exerted by oxygen is

A. 1/2

B. 1/3

C. 2/3

D. 1/3 x (273/298)

3. HI was heated in a sealed tube at 440^oC till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

A. 0.282

B. 1.99

C. 0.0199

D. 0.0796

4. The molar heat of vaporisation D H_vap for water is 2079 cal mol ^-1, therefore, molar heat of condensation of water is

A. + 2079 cal mol ^-1

B. - 2079 cal mol ^-1

C. greater than 2079 cal mol ^-1

D. smaller than 2079 cal mol ^-1

5. Which of the following is an insulator?

A. Diamond

B. Graphite

C. Aluminium

D. Silicon

6. The purest coal is

A. Anthracite

B. Bituminous

C. Peat

D. Lignite

7. Among N ^3-, O ^2-, F ^-, and Na⁺, which one has largest size?

A. N ^3-

B. O ^2-

C. F ^-

D. Na⁺

8. Ni, Pt, Pd belong to which group of the periodic table?

A. 12th

B. 14th

C. 8th

D. 10th

9. A mixture of 200 ml of dry hydrogen and oxygen in equal proportion at STP is exploded in an audiometer. What will be the nature of components in the audiometer immediately after the explosion?

A. 50 ml of steam only

B. 50 ml of steam and 50 ml of hydrogen

C. 50 ml of steam and 50 ml of oxygen

D. 100 ml of steam and 50 ml of oxygen

10. If 9.8 gm of hexane bums completely in oxygen, how many moles of CO₂ is produced?

A. 6

B. 0.6

C. 0.9

D. 1.2

11. Which one of the following nitrates does not give NO₂ on heating?

A. NaNO₃

B. Pb(NO₃)₂

C. AgNO₃

D. Cu(NO₃)₂

12. Which has lowest 1st I.P.?

A. N

B. Be

C. B

D. C

13. The oxidation states of phosphorus vary from

A. - 3 to + 5

B. - 1 to + 1

C. - 3 to + 3

D. - 5 to + 1

14. The molecular velocity of any gas is

A. proportional to the absolute temperature

B. proportional to the square of the absolute temperature

C. proportional to the square root of the absolute temperature

D. independent of the absolute temperature

15. Which of the following is an endothermic reaction?

A. 2H₂ + O₂ ® 2H₂O

B. N₂O₂ ® 2NO

C. 2NaOH + H₂SO₄ ® Na₂SO₄ +2H₂O

D. C₂H₅OH + 3O₂ ® 2CO₂ + 3H₂O

16. A solution of sodium sulphate in water is electrolysed between inert electrodes. The product at the cathode and anode are respectively

A. H₂, O₂

B. O₂, H₂

C. H₂, Na

D. O₂, SO₂

17. Bauxite mineral containing iron as impurity is purified by

A. Baeyer’s process

B. Electrolytic process

C. Hoope's process

D. Serpeck's process

18. Butter of tin is represented by

A. SnCl₂.3H₂O

B. SnCl₂.5H₂O

C. SnCl₂.6H₂O

D. SnCl₂.8H₂O

19. Which group activates the benzene ring towards electrophilic substitution?

A. bezo group

B. amino group

C. acetyl group

D. carbyl group

20. Phenol is less acidic than

A. ethanol

B. propenol

C. p-nitrophenol

D. none of the above

21. When oxalic acid crystals are heated with phosphorus pentaoxide, we get

A. vapours of phosphorus trioxide

B. carbon monoxide

C. carbon dioxide and water vapours

D. carbon monoxide and carbon dioxide

22. When very dilute nitric acid acts on magnesium, it gives rise to

A. ammonia

B. nitrous oxide

C. hydrogen

D. nitric oxide

23. The general formula for alkene is

A. C_nH_{2n + 2}

B. C_nH_{2n - 2}

C. C_nH_2n

D. C_nH_n

24. The coloured discharge tubes for advertisements contain

A. Argon

B. Xenon

C. Helium

D. Neon

25. While preparing Cl₂ from HCl, MnO₂ acts as a/an

A. dehydrating agent

B. reducing agent

C. catalytic agent

D. oxidising agent

26. When a bee bites, it injects mainly

A. formic acid

B. acetic acid

C. carbonic acid

D. hydrochloric acid

27. Most stable valence state of Mn in its salts is

A. 2

B. 5

C. 3

D. 7

28. The polarity is maximum in

A. N-F

B. C-F

C. O-F

D. F-F

29. Which of the following is used in radio carbon dating?

A. C¹²

B. C¹¹

C. C¹³

D. C¹⁴

30. If one starts with 1 curie of radioactive substance (T_1/2 = 12 hr), the activity left after a period of 1week will be about

A. 1 curie

B. 120 microcurie

C. 60 microcurie

D. 8 millicurie

31. The number of d-electrons in [Cr (H₂O₆)]³⁺ ion (Atomic no. of Cr = 24) is

A. 2

B. 3

C. 4

D. 5

32. The pyrites are heated with hydrochloric acid. The solution so obtained will give blood red colour with

A. K₄Fe(CN)₆

B. KCN

C. K₃Fe(CN)₆

D. KSNC

33. Which of the following structures is most likely for XeOF₄?

A. Tetrahedral

B. Square pyramidal

C. Square planar

D. Octahedral

34. The harmonic connected with growth of animal is

A. Pepsin

B. Ptylin

C. Thyroxine

D. Renin

35. The correct order of increasing oxidising power is

A. F₂ < Cl₂ < Br₂ < I₂

B. F₂ < Br₂ < Cl₂ < I₂

C. Cl₂ < Br₂ < F₂ < I₂

D. I₂ < Br₂ < Cl₂ < F₂

36. Nitrates of all metals are

A. unstable

B. stable

C. coloured

D. soluble

37. Bromination of aniline will give

A. 2, 3, 4 trinitrophenol

B. 2, 4, 6 tribromoaniline

C. 1, 3, 5-tribromoaniline

D. 2, 3, 5-tribromoaniline

38. Acetamide is treated separately with the following reagents. Which of them would give methylamine?

A. PCl₅

B. NaOH/Br₂

C. Sodalime

D. Hot conc. H₂SO₄

39. Acetic acid exists as a dimmer in benzene due to

A. condensation reaction

B. hydrogen bonding

C. presence of carbonyl group

D. presence of H-atom and a -carbon atom

40. There is no s-s bond in

A. S₂O₄^{2 -}

B. S₂O₅^{2 -}

C. S₂O₅^{2 -}

D. S₂O₆^{2 -}

41. Which one of the following statements shows the difference between ketone and ether?

A. Ether contains N, P but ketone does not contain N, P

B. Ether reacts with phenyl-hydrazine but ketone does not

C. Ketone does not give acetylation but ether does

D. None of these

42. Dry distillation of calcium acetate yields

A. acetaldehyde

B. formaldehyde

C. acetone

D. ethane

43. Phenol under vigorous nitration condition, i.e., treating with conc. HNO₃ and conc. H₂SO₄ will give

A. 1, 2, 3-trinitrophenol

B. Diethylbenzene

C. Aniline

D. 2, 4, 6-trinitrophenol

44. The reaction of C₂H₅MgCl with acetaldehyde on acidification yields

A. an aldehyde

B. a ketone

C. a primary alcohol

D. a secondary alcohol

45. For an exothermic reaction, temperature increases by 10^oC; then how will the equilibrium be attained faster?

A. 2 times

B. same

C. 1/2times

D. 4 times

46. A catalyst increases the rate of reaction as

A. reacting substances are brought into higher specific relation with each other

B. energy is added to the system

C. molecules of the reactants are speeded up so that random encounters are more

D. product of the reaction are removed simultaneously

47. What weight of K₂Cr₂O₇ would be required to produce 100 ml of 0.1 N K₂Cr₂O₇ solution? (Eq. Wt. of K₂Cr₂O₇ = 49)

A. 0.049 gm

B. 4.9 gm

C. 0.49 gm

D. 0.0049 gm

48. Molecular O₂ contains two unpaired electrons. They are

A. p * and s

B. s * and p

C. s * and p *

D. p * and p *

49. In the addition of HBr to propene in the absence of peroxides, the first step involves the addition of

A. H⁺

B. Br ^–

C. H^o

D. Br^o

50. The number of sigma bond in toluene is

A. 12

B. 18

C. 15

D. 9

51. It is possible to distinguish between optical isomers by

A. infra-red spectroscopy

B. mass spectrometry

C. melting point determination

D. polarimetry

52. Organic Compounds of carbon and hydrogen and with a general formula C_nH_2n are called

A. alkanes

B. alkenes

C. alkynes

D. olefines

53. Electrolysis of CH₃COOK will give

A. methane

B. ethene

C. ethane

D. manganese

54. Coinage metals are present in

A. s-block

B. d-block

C. p-block

D. f-block

55. The most commonly used silver salt in photography is

A. AgNO₃

B. AgCl

C. AgBr

D. Ag₂O₃

56. Besides iron, essential component of steel is

A. cobalt

B. chromium

C. copper

D. manganese

57. An important mineral for magnesium is

A. malachite

B. cassiterite

C. carnalite

D. galena

58. If a reaction takes place like H₃BO₃ + NaOH ® X + H₂O, then X will be

A. Na₂BO₃

B. NaBO₂

C. Na₃BO₃

D. none of these

59. Which of the following nitrate evolves laughing gas on heating?

A. KNO₃

B. Pb(NO₃)₂

C. NH₄NO₃

D. AgNO₃

60. Nitrogen (I) oxide is produced by

A. thermal decomposition of ammonium nitrate

B. disproportion of ammonium N₂O₄

C. thermal decomposition of ammonium nitrite

D. interaction of hydroxylamine with nitrous acid

61. Inertness of N₂ gas is due to

A. no vacant d orbital

B. high dissociation energy

C. high electronegativity

D. none of these

62. In reaction of H₂O₂ and alkaline K3Fe(CN)6, H₂O₂ acts as a/an

A. acid

B. base

C. oxidant

D. reductant

63. Which of these contains only an electron and a proton?

A. Helium

B. Deuterium

C. Hydrogen

D. Tritium

64. For reaction N₂ (g) + O₂ (g) ® 2NO (g), D H = + 1812, then

A. D E = D H

B. D E > D H

C. D E < D H

D. none of these

65. What will be the IUPAC name of CH₂ = CHCH₂Cl?

A. 1-chlorotripropene

B. 3-chloro-1-propene

C. Methylchloroethene

D. 1-chloro-2-methylethene

66. Which of the following statements is/are wrong?

A.All hydrocarbons containing 6 carbon atoms are aromatic

B. There is no organic compound except bromine which contains 6 C atoms and is known as aromatic compound

C. Hydrocarbon contains C, H, N, P, etc.

D. All of the above

67. Which of the following is the hardest substance?

A. Steel

B. Graphite

C. Silicon

D. Diamond

68. Hydrogen gas has

A. covalent bonding

B. ionic bonding

C. metallic bonding

D. Vander Wall’s force

69. The momentum associated with a photon of frequency v is

A. hv/c

B. hc/v

C. uc/h

D. h/uc

70. Slag is an easily fusible material formed by the reaction between

A. ore and the flux

B. ore and reducing agent

C. impurities present and the flux

D. none of these

71. (C₆H₅NH₂ + COCl₂ + [A] ® C₆H₅NH.CO.NHC₆H₅). The compound [A] is

A. (C₆H₅)2NH

B. C₆H₅NH₂

C. (CH₃)₃N

D. (C₆H₅)₃N

72. In which molecule, the distance between the two adjacent carbon a1kanes is largest?

A. Ethane

B. Ethene

C. Ethyne

D. Benzene

73. Baeyer's reagent is

A. alkaline permanganate solution

B. acidified permanganate solution

C. neutral permanganate solution

D. aqueous bromine solution

74. The hybridisation of carbon atom in C-C single bond of HC º C – CH = CH₂ is

A. sp³-sp³

B. sp²-sp³

C. sp-sp²

D. sp³-sp

75. Iron is in + 2 oxidation state in

A. K₄[Fe(CN)₆]

B. K₃[Fe(CN)₆]

C. Na₂[Fe(NO)₂CN)₅]

D. [Fe(OH)₂]⁺

76. Transition metals

A. exhibit dia magnetism

B. do not form alloys

C. undergo inert pair effect

D. show variable oxidation state

77. Ozone can be easily detected by the use of

A. silver

B. silver chloride

C. mercury

D. hydrogen peroxide

78. Oxygen molecule exhibits

A. paramagnetism

B. bleaching powder

C. potassium permanganate

D. sodium peroxide

79. Which of the following phosphorus oxyacids is reducing in character?

A. H₃PO₃

B. H₃PO₄

C. H₄P₂O₆

D. H₄P₂O₇

80. Which one of the following is dibasic acid?

A. Phosphorous acid

B. Hypophosphorous acid

C. Phosphoric acid

D. Hypophosphoric acid

81. A solution was prepared by mixing 50 ml of 0.2 M HCl and 50 ml of 0.10 M NaOH. The pH of the solution is

A. 7.0

B. 2.0

C. 3.0

D. 1.2

82. Which dye among the following is a vat dye?

A. Martins yellow

B. Alizarin

C. Indigo

D. Malachite green

83. The path of a beam of light through smoke is visible because

A. carbon dioxide in the smoke scatters light

B. carbon dioxide in the smoke absorbs light

C. colloidal particles in the smoke absorb light

D. colloidal particles in the smoke scatter light

84. Which of the following statements is incorrect?

A. Colloidal particles pass through the pores of filter paper

B. Colloidal particles have large surface area

C. Colloidal particles are charged particles

D. Colloidal particles are neutral

85. The plastic household crockery is prepared using

A. malamine and tetrafluoroethene

B. malonic acid and hexamethyleneamine

C. malamine and vinyl acetate

D. malamine and formaldehyde

86. An isotope is formed when successive active emissions of an element are

A. a .b , a

B. b .b , a

C. b .b , b

D. a .a , b

87. It is not true that

A. the wavelength associated with an electron is longer than that of proton, if they have the same speed

B. violet radiations have longer wavelength than red radiations

C. the energy of light with l = 600 Nm is lower than that with l = 500 Nm

D. spectrum of an atom is known as line spectrum

88. It is true that

A. some complex metal oxides behave as super-conductors

B. zinc oxide can act as a super-conductor

C. an impurity of tetravalent germanium in trivalent gallium creates electron deficient

D. a Frenkel defect is formed when an ion is displaced from its lattice site to an interstitial site

89. Allyl cyanide has

A. 9s and 4p bonds

B. 9s , 3p and 2 non-bonding electrons

C. 8s , 3p and 4 non-bonding electrons

D. 8s and 5p bonds

90. The chemical change in the reaction

CH₂COCH₃ + HCHO ® CH₂COCH₂CH₂ is an example of

A. oxidation reduction

B. disproportionation

C. aldol addition

D. none of the above

91. A fairly specific test for phenol is

A. coupling with diazonium salt

B. decolourisation of bromine water

C. dissolution in aqueous alkali

D. decolourisation of KMnO₄

92. The elevation in the boiling point would be highest for

A. 0.08 M barium chloride

B. 0.10 M glucose

C. 0.15 M potassium chloride

D. 0.06 M calcium nitrate

93. A 0.2 molal aqueous solution of weak acid (HX) is 20% ionised. The freezing point of this solution is (Given K_f = 1.86°C m^-1 for water)

A. - 0.45°C

B. - 0.53°C

C. - 0.90°C

D. - 0.31°C

94. 6.0 g of urea (molecular weight = 60) was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P_o, the vapour pressure of solution is

A. 0.10 P_o

B. 1.10 P_o

C. 0.90 P_o

D. 0.99 P_o

95. A molecule with the highest bond energy is

A. bromine

B. fluorine

C. chlorine

D. iodine

96. A substance is found to contain 7% nitrogen. The minimum molecular weight of it is

A. 700

B. 100

C. 200

D. 70

97. Sodium nitroprusside when added to an alkaline solution of sulphide ions produces purple coloration due to the formation of

A. Na [Fe(H₂O)₅NOS]

B. Na₄ [Fe(CN)₅NOS]

C. Na₃ [Fe(CN)₅NOS]

D. Na₄ [Fe(H₂O)₅NOS]

98. The bond energy (k cal mol ^-l) of carbon-carbon bond in ethylene is approximately equal to

A. 59

B.100

C. 33

D. 150

99. Which of the following molecule is planar?

A. n-hexane

B. glycerine

C. cyclohexane

D. fumaric acid

100. A mixture of butane, ethylene and dimethyl acetylene is passed through acidified permanganate solution. The gas that comes out is

A. butane

B. a mixture of butane and ethylene

C. methyl acetylene

D. a mixture of all compounds