EASY
7th ICSE
IMPORTANT
Earn 100

The evaporation of water is a chemical change. 

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Important Questions on Physical and Chemical Changes

MEDIUM
7th ICSE
IMPORTANT

Heat, light or electricity is required for a chemical change. 

EASY
7th ICSE
IMPORTANT

Give an example of the following type of change.

A human-made change.

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7th ICSE
IMPORTANT

Give an example of the following type of change.

A non-periodic change.

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7th ICSE
IMPORTANT

Give an example of the following type of change.

A slow change.

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7th ICSE
IMPORTANT

Give an example of the following type of change.

A desirable change.

EASY
7th ICSE
IMPORTANT

Give an example of the following type of change.

An undesirable change.

MEDIUM
7th ICSE
IMPORTANT

Pick the odd one out. Give a reason for your choice. 
Boiling an egg, preparing idli, writing a book, baking bread.

MEDIUM
7th ICSE
IMPORTANT

Pick the odd one out. Give a reason for your choice.

The sun rising, lightning striking, a baby growing up, building a dam.