MEDIUM
9th CBSE
IMPORTANT
Earn 100

What is the particle size of a colloidal solution?

Important Questions on Is Matter Around Us Pure

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 13

Define emulsion. Give two examples.

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 14

How will you test whether the given solution is a colloidal solution?

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 15

What is the reason for the difference in properties of solution, colloids and suspension?

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 16

What is a physical change? Give two examples of physical changes.

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 17

What is a chemical change? Give two examples of chemical changes.

HARD
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 18

State one instance where water undergoes a physical change and one in which it undergoes a chemical change.

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 19

Digestion of food is a physical change or chemical change?  

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 2 - Is Matter Around Us Pure>Exercise>Q 19

The following is a physical change or a chemical change?

Growth of a plant.