Question

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

• A. Liquid $A$ has higher boiling point than that of liquid $B$
• B. Liquid $A$ has higher latent heat of vaporisation than that of liquid $B$
• C. Liquid $A$ has lower latent heat of vaporisation than that of liquid $B$
• D. The boiling points of liquid $A$ and $B$ are equal

Answer 1

The correct option is C Liquid $A$ has lower latent heat of vaporisation than that of liquid $B$

Liquid A gives cooling sensation means liquid A is absorbing more heat from the skin,

so, liquid A and B can be differentiated as liquid A has lower latent heat of vaporisation than that of liquid B.