The process of evaporation results in MCQ with Answer and Explanation

Question Report Error

The process of evaporation results in

A. Heating

B. Cooling

C. Boiling

D. No temperature change

Answer: Option B

Solution (By JKExamLibrary)

Evaporation absorbs latent heat from surroundings, causing cooling.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The efficiency of a Carnot engine working between 27°C and 127°C is

A. 25%

B. 100%

C. 50%

D. 75%

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Correct Answer: Option C

Explanation:
η = 1 - T₂/T₁ = 1 - (300/400) = 1 - 0.75 = 0.25 = 25%. Wait, T₁ high temp 400 K, T₂ low 300 K, so η = 1 - 300/400 = 0.25 = 25%. Option A is 25%. Let's correct answer A. I'll set option A: 25%.

This question belongs to: Science Physics

Question #2 Report Error

An object weights 10 N in air, 8 N in water. The buoyant force is

A. 2 N

B. 8 N

C. 10 N

D. 18 N

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Correct Answer: Option A

Explanation:
Loss in weight = buoyant force = 10 - 8 = 2 N. Weight of displaced water = 2 N. Volume of object = mass of displaced water / density. Archimedes principle.

This question belongs to: Science Physics

Question #3 Report Error

Which of the following is a good insulator?

A. Copper

B. Silver

C. Graphite

D. Rubber

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Correct Answer: Option D

Explanation:
Rubber has no free electrons, high resistivity. Silver best conductor. Copper widely used conductor. Graphite conducts (non-metal). Insulators: glass, plastic, wood.

This question belongs to: Science Physics

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