EASY
7th CBSE
IMPORTANT
Earn 100

How can you say that cutting of a paper is a physical change?

Important Questions on Physical and Chemical Changes

MEDIUM
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q A
What is a chemical change? Give two examples of chemical changes.
EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q A
Give two methods to prevent the rusting of iron.
EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q B
What type of change is melting of wax?
EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q B
What are the essential conditions for rusting of iron objects?
EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q B
What are the constituents of stainless steel?
EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q C

 In which of the following processes, a new substance is formed?

EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q C

Dissolving salt in water is a/an _____.

EASY
7th CBSE
IMPORTANT
Exploring Science BASED ON THE LATEST NCF GUIDELINES 7>Chapter 6 - Physical and Chemical Changes>Exercise>Q C

The cut surface of brinjal turns black due to a _____ change.