Statement 1: On increasing the surface area of any liquid at constant temperature, the rate of evaporation increases.
Statement 2: Increase in surface area at constant temperature increases the escaping tendency of molecule of liquid at surface.

Question

Statement 1: On increasing the surface area of any liquid at constant temperature, the rate of evaporation increases.

Statement 2: Increase in surface area at constant temperature increases the escaping tendency of molecule of liquid at surface.

TestHub · Accepted Answer

Statement 1 is correct: rate of evaporation is proportional to the exposed surface area. Statement 2 is incorrect: the escaping tendency of an individual surface molecule (reflected in the vapour pressure) depends only on temperature and intermolecular forces, not on surface area. A larger area only places more molecules at the surface; it does not raise each molecule's tendency to escape. I correct, II incorrect. Ans: (c).

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