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Q.

A drop each of two non - corrosive and non- irritating liquids A and B at a temperature of 22°C are placed on the skin. Liquid A gives a more cooling sensation than liquid B. Which of the following can be said about liquids A and B?

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a

Liquid A has high boiling point than that of liquid B

b

The boiling points of liquid A and B are equal

c

Liquid A has higher latent heat of vaporization than that of liquid B

d

Liquid A has lower latent of vaporization than that of liquid B

answer is B.

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Detailed Solution

The cooling or burning sensation given by a substance is based on its latent heat. If it is having a more latent heat it can give more cooling or burning sensation.

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