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Question (31)

QN004820

Which observation supports faster evaporation?

(A) water level increases
(B) water disappears quickly from wide plate
(C) ice formation
(D) water becomes salty

Correct Answer: B

Explanation:

Quick disappearance shows fast evaporation

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Question (32)

QN004821

On a rainy day, drying of clothes is slow because:

(A) air is dry
(B) humidity is high
(C) temperature is high
(D) wind is strong

Correct Answer: B

Explanation:

High humidity slows evaporation

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Question (33)

QN004822

Which will evaporate faster?

(A) 10 mL water in plate
(B) 10 mL water in closed bottle
(C) 10 mL water in narrow tube
(D) 10 mL water in covered cap

Correct Answer: A

Explanation:

Open plate has maximum surface area

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Question (34)

QN004823

If air movement increases, evaporation time will:

(A) increase
(B) decrease
(C) remain same
(D) become zero

Correct Answer: B

Explanation:

Faster evaporation reduces time

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Question (35)

QN004824

Which statement is correct?

(A) Evaporation decreases with surface area
(B) Evaporation increases with surface area
(C) Surface area has no effect
(D) Evaporation stops in sunlight

Correct Answer: B

Explanation:

Larger surface area increases evaporation

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Question (36)

QN004825

The main reason sweat cools the body is because it:

(A) melts on skin
(B) evaporates and removes heat
(C) freezes on skin
(D) increases humidity inside body

Correct Answer: B

Explanation:

Evaporation takes heat away from body

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