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Question

Why do we feel a cold sensation if we put nail polish remover on our skin?

A
Acetone freezes on our hand surface.
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B
Acetone evaporates rapidly, leaving a cooling sensation.
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C
Acetone starts boiling taking heat from the hand.
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D
Acetone melts on our hand.
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Solution

The correct option is B Acetone evaporates rapidly, leaving a cooling sensation.
Evaporation causes cooling. The particles of a substance while evaporating absorbs heat energy from its surroundings and convert into vapour. Acetone has a low boiling point of 56C. So, when we put acetone on our hand or skin, being highly volatile, it evaporates rapidly absorbing heat from the hand and leaving back a cold sensation. Therefore, we feel cold.

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