Question

c) Is it necessary that all the physical changes are reversible changes? Explain
with example.​

Answer 1

No, all physical changes are not reversible, as the element can also be changed to a crystal. the most basic example of an reversible physical change is convertin of water into either ice or water vapour.

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Answer 2

Explanation:

No, there are some physical changes which are irreversible. For example, tearing of a paper. When a paper is torn, the size and the shape of the paper changes, but the molecules of the paper remains the same. Since, no new molecules are formed, tearing paper is a physical change.