Question

Which of the following is not a physical change?

• A. Cutting of paper
• B. Folding of paper
• C. Twisting of paper
• D. Burning of Paper

Answer 1

The correct option is D Burning of Paper

While burning a paper, its chemical composition changes. Hence, it is a chemical change and not a physical change.
However, in cutting, twisting or folding a paper, only its physical properties change and there is no change in its composition. So, these are all physical changes.