set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following statements is true about a colloidal system?

a) It can be made out of two gases

b) It consists of one phase only

c) It carries a net electric charge

d) It is electrically neutral as a whole

Question : 2

On passing through a colloidal solution, the beam of light gets ..........

a) scattered

b) refracted

c) reflected

d) absorbed

Question : 3

A change is said to be a chemical change when

a) it is accompanied by change in physical properties

b) it is accompanied by formation of new substances

c) it is accompanied by energy change

d) All the above are correct

Question : 4

Which of the following is an example of a homogeneous substance?

a) Oil-water solution

b) Copper sulphate

c) Granite

d) Muddy water

Question : 5

When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime whole water has turned pink. This is due to

a) sublimation of crystals

b) boiling

c) melting of potassium permanganate crystals

d) diffusion

Question : 6

Select the correct order of evaporation for water, alcohol, petrol and kerosene oil

a) petrol > alcohol > water > kerosene oil

b) water > alcohol > kerosene oil > petrol

c) alcohol > petrol > water > kerosene oil

d) petrol > alcohol > kerosene oil > water