Question

Which of the following is a reversible change?

• A. Cutting stars out of paper.
• B. Baking bread.
• C. Freezing orange juice to make ice lollies.
• D. Breaking a window pane

Answer 1

The correct option is C

Freezing orange juice to make ice lollies.

Orange juice, which is frozen into ice-lollies, can be melted to give back the orange juice. So, it is a reversible change.
All of the other changes are irreversible changes. Stars cut out from paper cannot be put together to get a full paper. Also, a baked bread cannot give back flour and after breaking a window pane, the glass pieces cannot be joined to give the exact window pane.