give reason for the following observations .
a)naphthalene balls dissappear with time living any solid.
b)our palm feel cold when we pat some acetone or petrol or perfume on it.
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give reason for the following observations .
a)naphthalene balls dissappear with time living any solid.
b)our palm feel cold when we pat some acetone or petrol or perfume on it.
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a. ans in above pic. (sry 4 bad handwriting)
b. Acetone,petrol and perfume are volatile substance that gets evaporated when they come in contact with air Evaporation is facilitated as it uses energy from the palm hence leaving a cooling effect on our palms.