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Evaporation causes cooling because:

Practice MCQ for SSC, UPSC, RRB Exams

A. Pressure decreases A.

B. Heat is absorbed during vaporization B.

C. Molecules move faster C.

D. Surface area decreases D.

Correct Answer: B সঠিক উত্তর: B

Explanation ব্যাখ্যা

Evaporation causes cooling because B) Heat is absorbed during vaporization.

Key Details:

When a liquid evaporates, the molecules with the highest kinetic energy (meaning they're moving the fastest) escape the liquid, leaving behind the slower-moving molecules.
These escaping molecules absorb heat from their surroundings to transition into a gas.
This absorption of heat lowers the temperature of the remaining liquid, resulting in a cooling effect.

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