Aspects of chemical changes — task. Physics CBSE Live product, Class 7 (2026-27).

Assertion and reason based questions:

1. Assertion: Cutting wood is a chemical change.

Reason: The shape and size of wood change.

Both Assertion and Reason are true, and Reason correctly explains Assertion.
Both Assertion and Reason are true, but Reason does not correctly explain Assertion.
Assertion is true, but Reason is false.
Assertion is false, but Reason is true.

2. Assertion: Boiling water is a chemical change.

Reason: Steam is formed from water.

Both Assertion and Reason are true, and Reason correctly explains Assertion.
Both Assertion and Reason are true, but Reason does not correctly explain Assertion.
Assertion is true, but Reason is false.
Assertion is false, but Reason is true.

Did you find an error?

4. Aspects of chemical changes