Chemistry - Mock Test 5

Question 41

How many alkene form by C₅H₁₀ (including stereo isomers)

A) 3 B) 4 C) 5 D) 6

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Question 42

C₆₀ contains

A) 20 pentagons and 12 hexagons B) 12 pentagons and 20 hexagons C) 30 pentagons and 30 hexagons D) 24 pentagons and 36 hexagons

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Question 43

Increasing order of electron gain enthalpy is

A) N < O < Cl < Al B) O < N < Al < Cl C) N < Al < O < Cl D) Cl < N < O < Al

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Question 44

Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of the mixture is found to be 28°C. Their specific heats are in the ratio of?

A) 3 : 2 B) 2 : 3 C) 1 : 1 D) 4 : 3

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Question 45

Irrespective of the source, pure sample, of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of

A) conservation of mass B) multiple proportions C) constant composition D) constant volume

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The H : O ratio in water is fixed, irrespective of its source. Hence it is law of constant composition

Question 46

Among the following pairs of compounds, the one that illustrates the law of multiple proportions is

A) NH₃ and NCl₃ B) H₂S and SO₂ C) CS₂ and FeSO₄ D) CuO and Cu₂O

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Question 47

A mixture of sand and iodine can be separated by

A) crystallization B) distillation C) sublimation D) fractionation

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By sublimation since Iâ‚‚ sublimes

Question 48

Which of the following halogen can be purified by sublimation

A) Iâ‚‚ B) Clâ‚‚ C) Brâ‚‚ D) Fâ‚‚

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Iodine undergoes sublimation (volatile solid). Others do not sublime.

Question 49

Dimension of pressure are same as that of

A) Energy B) Force C) Force per unit volume D) Energy per unit volume

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Question 50

One fermi is

A) 10⁻¹⁵ cm B) 10⁻¹³ cm C) 10⁻¹⁰ cm D) 10⁻¹² cm

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