MEDIUM
7th CBSE
IMPORTANT
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A solid formed in a reaction is called a .

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Important Questions on Physical and Chemical Changes

EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q B
Change of state is a physical change.
EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q B
Burning of carbon is a chemical change.
MEDIUM
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q B
Salt water slows down rusting.
EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q B
Crystallisation is a chemical change.
EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q B
Cooking of food is a desirable chemical change.
EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q C
Which of the following is not a physical change?
EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q C
Which of the following is true about a chemical change?
EASY
7th CBSE
IMPORTANT
LEARNING edge SCIENCE and TECHNOLOGY 7>Chapter 6 - Physical and Chemical Changes>Worksheet SA>Q C
Which of the following is needed for rusting?