Question # 1

Rte of evaporation of petrol is greater than that of water at room temperature. This is due to the reason that:

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petrol is an organic compound

water molecules have small size

petrol molecules do not have

petrol molecules have greater size

During the manufacturing process of cement the temperature of the decomposition zone goes up to

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600°C

800°C

1000°C

1200°C

Which liquid is more volatile?

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water

mercury

benzene

honey

Catalyst used for ammonia synthesis is

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Cu

Co

Zn

Fe

If internal energy of the system is increased

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Change in state of the system may occur

Temperature of the system may rise

Chemical reaction may take place

All of these

The number of resonating structures of phenoxide ion are

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3

5

6

4

Organic pollutants in water are measured by

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DO

COD

Water logging

PH

C=O and C=C bonds are differentiated by

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Hybridization of C-atom

Bond angles

Ammonical AgNO3

Conc. HNO3

Which woody raw material is used of the manufacture of paper pulp?

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cotton

bagasse

poplar

rice straw

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 litres

11.2 litres

1 litre

2.24 litres

All the Hydrolytic reactions are

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First order

Second order

Third order

pseudo-first order

Which one of the following reactions is not spontaneous

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Polyester resins have special use in:

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Clothing

Paints

Emulsion

Floor covering

The entropy of the universe

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Constant

Is equal to zero

Decreasing

Increasing

If the salt bridge is not used between two half cells, then the voltage

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Decrease rapidly

Decrease slowly

Does not change

Drops to zero

Which structure shows a primary alcohol

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The distillation of coal at high temperature and in absence of air is called

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Vacuum distillation

Normal distillation

Fractional distillation

Destructive distillation

In zero order reaction, the rate is independent of :

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Temperature of reaction

Concentration ofreactants

Concentration of products

None of these.

Addition of iron fillings to CuSO₄solution caused precipitation of Cu owing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

In the expression rate = K [A]^a[B]^bK is

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The order of reaction

The speed of reaction

The specific rate constant

The overall order of reaction

The solution of which acid is used for seosoning of food ?

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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3.01 x 10²³

1.5 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

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