Question

Give reason why the size of napthalene balls placed in cupboards goes on decreasing with time.​

Answer 1

napthalene balls have a property to sublime at room temperature itself and thus when they are placed in the cupboard they decrease in size. siblimation is the process of conversion of matter from solid to gas .

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Answer 2

napthalene balls is also called moth when it is kept in cupboards it's size decrease because moth balls are directly changes to gas without reaching liquid si due to the temperature in cupboards is size decrease and another thing is moth gas kill the rats