Question # 1

Crystal can be classified in to basic crystal habits

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7

4

14

3

Most common reactions of benzene and its derivatives are

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Electrophilic addition reactions

Electrophilic substitution reactions.

Nucleophilic addition reactions

Nucleophilic substitution reactions

The vapour density of a gas is 11.2 The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 liters

11.2 liters

1 liter

2.24 liters

The relative rate of diffusion of a gas (molecular wright - 128) as compared to oxygen is

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2 times

1/4

1/8

1/2

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysus

The unit of rate constant for a zero order reaction is

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Liter sec^-1

Liter mol^-1sec^-1

Mol liter^-1sec^-1

Mol sec^-1

1 mole of CH₄ contains

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6.02 x 10²³ atoms of H

4 g-atom of hydrogen

1.81 x 1023 molecules of CH₄

3.0 g of carbon

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