set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

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

Question : 2

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 : 3

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

a) Oil-water solution

b) Copper sulphate

c) Granite

d) Muddy water

Question : 4

Which one of the following is not a mixture?

a) Baking soda

b) Tootpaste

c) Toilet soap

d) Vinegar

Question : 5

Compounds

a) contain only one type of element

b) can be separated by their physical properties

c) are the same as mixtures

d) are different kinds of atoms chemically combined with each other.

Question : 6

Which one of the following elements shows variable equivalent mass?

a) Calcium

b) Zinc

c) Silver

d) Iron