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Question

Which of the following is a reversible change?


  1. Orange juice is frozen to make ice lollies.

  2. Cutting trees

  3. Cutting stars out of paper.

  4. Baking bread.


Solution

The correct option is A

Orange juice is frozen 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.

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