Question

5. During a chemical change :
(a) state of substance changes only
(b) composition of a substance changes
only
(c) both state as well as composition of
substance change
(d) none of these
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Answer 1

Answer:

both state and composition changes.

bcz there is formation of a new substance in a chemical change.

Explanation:

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Answer 2

Answer:

C ) Both , state and composition of the substance changes.

Since in a chemical change the reactant undergoes bonding or dissociation in/with other atoms/molecules , new substances with completely diffrent properties are formed .