Define physical changes.

Important Questions on Physical and Chemical Changes

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q II

Define chemical changes.

EASY

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q II

Define pasteurisation.

EASY

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q II

Define the term fermentation.

EASY

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q II

Define the term endothermic changes.

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

State whether rusting of iron is a physical or a chemical change? How can you prevent rusting of iron?

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

Is an earthquake a periodic or non-periodic change? Give reasons. Also mention some of the losses that occur due to earthquakes. 

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

What are periodic and non-periodic changes? Is cyclonic weather a periodic or non-periodic change? 

MEDIUM

7th ICSE

IMPORTANT

Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

Is falling of leaves from a tree an irreversible change? Give reasons.