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Question

Which among the following is an example of a permanent change?

A
Boiling of water
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B
Melting of ice
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C
Cutting of trees
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D
Making paper planes
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Solution

The correct option is C Cutting of trees
The changes which cannot be undone are called permanent changes. Among the given options cutting of trees is the permanent change since we cannot get back the original tree. Rest of the given changes can be undone, so they are not permanent.

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