MEDIUM
9th CBSE
IMPORTANT
Earn 100

Identify whether the following is a chemical change or a physical change?
A glass bottle breaking is _____ change. (Chemical/Physical)

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Important Questions on Is Matter Around Us Pure

MEDIUM
9th CBSE
IMPORTANT

Identify whether the following are chemical change or physical change? Give reason.

Coal burning in air.

EASY
9th CBSE
IMPORTANT

Identify whether the following is a chemical change or physical change?

Making a cake.

MEDIUM
9th CBSE
IMPORTANT
Identify whether the following is a chemical change or physical change? Give reason.
Wool being knitted into a sweater is a _____ change. (Chemical/Physical)
EASY
9th CBSE
IMPORTANT
Define solubility of a substance. How does it vary with temperature?
EASY
9th CBSE
IMPORTANT
What do you understand by the statement “the solubility of copper sulphate in the water at 20oC is 20.7 g”?
EASY
9th CBSE
IMPORTANT
What is the effect of temperature on the solubility of solids in liquids?
EASY
9th CBSE
IMPORTANT
What is meant by a solution? Give two examples of solutions.
EASY
9th CBSE
IMPORTANT
What is a suspension? Give two examples of suspensions.