EASY
7th ICSE
IMPORTANT
Earn 100

Give an example of a desirable and an undesirable change. 

Important Questions on Physical and Chemical Changes

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 2

Why is heating an iron rod a physical change? 

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 3

What is rusting? What are the conditions necessary for rusting to take place? 

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 4

What kind of change is respiration? What happens during respiration? 

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 5

List an example of a fast chemical change, a chemical change accompanied by a change in colour and a chemical change accompanied by the release of heat. 

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 6

Why is the reaction of quicklime with water classified as a chemical change? 

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 1

Describe three periodic changes you observe in nature. 

MEDIUM
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 2
List the characteristics of a physical change. 
HARD
7th ICSE
IMPORTANT
Inspired Chemistry-7>Chapter 2 - Physical and Chemical Changes>CHECKPOINT>Q 3

Outline an experiment to show that the dissolution of a substance in water is a physical change and not a chemical change.