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Evaporation MCQs

Practice important Evaporation MCQs with answers, explanations, theory links, and exam-focused preparation.

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Evaporation

Evaporation MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Evaporation
Evaporation causes cooling because:
A. High-energy molecules escape from the liquid
B. Water becomes heavier
C. Gravity disappears
D. Light stops moving
Read Theory
Correct Answer: A
A: Correct because faster molecules leave the liquid, reducing average kinetic energy and temperature. B: Wrong because cooling is not caused by water becoming heavier. C: Wrong because gravity does not disappear during evaporation. D: Wrong because light motion is unrelated to evaporative cooling.
CSS - PMS - CCE - PCS - General Science Evaporation
At sea level, pure water normally boils at:
A. 0°C
B. 37°C
C. 100°C
D. 212°C
Read Theory
Correct Answer: C
A: Wrong because 0°C is the freezing point of water. B: Wrong because 37°C is close to normal human body temperature. C: Correct because water boils at 100°C at standard atmospheric pressure. D: Wrong because 212 is the boiling point in Fahrenheit, not Celsius.
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