MEDIUM
7th ICSE
IMPORTANT
Earn 100

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

Important Questions on Physical and Chemical Changes

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.
MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III
Give three characteristics of physical changes.
HARD
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III
Give three characteristics of a chemical change.
MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

Identify the change and state whether energy is absorbed or evolved.

Burning of paper.

MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

Identify the change and state whether energy is absorbed or evolved.

Growth in plants.

MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 2 - Physical and Chemical Changes>EVALUATE YOUR UNDERSTANDING>Q III

Identify the change and state whether energy is absorbed or evolved.

Making of food by green leaves.