Question

1. What are physical and chemical changes ?
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Answer 1

Answer:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Answer 2

Explanation:

Physical changes = the change that take place without producing a new substance ; and only change shape, size of substance is called physical changes.

Chemical change = a change in which new substance is formed is called chemical changes

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