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Q.

Is it true that naphthalene balls kept in stored clothes in our homes disappear over a period of time?

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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
Naphthalene is a solid substance which undergoes sublimation in which the solid naphthalene is converted into gas vapours directly without going through a liquid phase. These vapours disappear in the air over a period of time because they are kept in stored clothes. Naphthalene balls help keep the fabric fresh and remove any fabric pests.
 
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