CBSE Class 7 Science Changes Around Us: Physical and Chemical (Class 7 NCERT New) Quiz 8

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CBSE › Class 7 › Science › Changes Around Us: Physical and Chemical (Class 7 NCERT New)

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1. What is a reversible change?

A a change that cannot be reversed B a change that can be reversed C I don't know D a change where a new substance is formed

2. What are irreversible changes?

A A change that cannot be reversed B A change that can be reversed C I don't know D A change in which no new substance are formed

3. What are physical changes?

A I don't know B a change where no new substance are formed C a change where a new substance has formed D A new formation of gas

4. What are chemical changes

A I don't know B a new formation of gas C a new formation of substance D No new formation of substance

5. Burning a log is a chemical change

A true B false

6. Melting of a popsicle is a reversible change

A true B false

7. Growth of animals and plants

A chemcial change B physical change C I don't know D Reversible change

8. Chemical changes are always irreversible

A true B false

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