Multiple choice

Which of the following changes is/are irreversible?

a. Rolling of dough into a ball. b. Burning of paper. c. Making an airplane by folding paper.

  1. only a

  2. only b

  3. only c

  4. a and b

  5. a and c

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an irreversible change. The paper cannot be retrieved back after it has burned.