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Question

__________ are the changes that can be undone.

A
Irreversible changes
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B
Reversible changes
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C
Chemical changes
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D
Fast changes
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Solution

The correct option is B Reversible changes
The changes that can be reversed or undone are called reversible changes.
E.g.- Freezing of water: During freezing, the state of water changes from liquid to solid. This can be reversed as water becomes liquid again on heating.

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