Question

Tearing of paper is irreversible. It is, therefore, a chemical change. Do you agree? Give reasons.

Answer 1

The tearing of paper is an irreversible change as we cannot get back the original sheet of paper from the pieces. However, there are no new substances created by tearing paper. The pieces of paper obtained have the same molecules as the original sheet of paper. Thus, tearing of a paper sheet is a not a chemical change, but it is a physical change.