Chemistry MCQs

Question 1

Muddy water is treated with alum in purification process, it is termed as :

Accepted Answer

Coagulation

Answer

Emulsification

Answer

Absorption

Answer

Adsorption

Question 2

Which one of the following is an example of a gel ?

Accepted Answer

Face cream

Answer

Cheese

Answer

Milk

Answer

Shaving cream

Question 3

A substance which readily forms colloidal solution in contact with water is called

Accepted Answer

Hydrophilic colloid

Answer

Extrinsic colloid

Answer

Associated colloid

Answer

Hydrophobic colloid

Question 4

Peptization is a process of

Accepted Answer

Dispersing precipitates into colloidal solution

Answer

Precipitation of colloidal particles

Answer

Purification of colloids

Answer

Protection of colloidal solution

Question 5

What do you understand by the term Espuma ?

Accepted Answer

Foam

Answer

Soap

Answer

Salt

Answer

Calcium

Question 6

Cloud is a colloidal dispersion of

Accepted Answer

Water drops in a dispersion medium of air

Answer

Air in a dispersion medium of water

Answer

Fog in a dispersion medium of water

Answer

Mist in a dispersion medium of air

Question 7

Activated Charcoal is used to remove colouring matter from pure substances by

Accepted Answer

Adsorption

Answer

Bleaching

Answer

Oxidation

Answer

Reduction

Question 8

The molecular mass of a gas is

Accepted Answer

Twice its vapour pressure

Answer

Equal to its vapour pressure

Answer

Half its vapour pressure

Answer

Not related to its vapour pressure

Question 9

The value of gas constant R in Ergs deg–1 mole–1 is

Accepted Answer

8.314 × 107

Answer

8.341 × 107

Answer

8.413 × 107

Answer

4.183 × 107