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Q.

Is it true that the melting of wax is a physical and reversible change?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
A physical change is a change that modifies some of a substance's physical properties without changing the substance's chemical makeup. Reversible refers to a change that can be undone or reversed. As a result, the substance's physical features, such as its size and form, change—wax melting results in liquid wax with no other substances formed, making it a physical change. Wax can also be recovered after freezing, making it a change that can be easily reversed.
 
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