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Question (11)

QN004800

Which of the following will evaporate slowest?

(A) Water in plate under fan
(B) Water in plate in sunlight
(C) Water in cap in shade
(D) Water in plate on windy day

Correct Answer: C

Explanation:

Small surface area and shade slow evaporation

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Question (12)

QN004801

Increasing air movement generally causes evaporation to:

(A) stop
(B) slow down
(C) increase
(D) freeze water

Correct Answer: C

Explanation:

Wind increases evaporation rate

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Question (13)

QN004802

Evaporation takes place:

(A) only at boiling point
(B) only in freezer
(C) at room temperature also
(D) only in sunlight

Correct Answer: C

Explanation:

Evaporation occurs at all temperatures

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Question (14)

QN004803

Which of the following is NOT a factor affecting evaporation?

(A) Exposed area
(B) Humidity
(C) Air movement
(D) Colour of container

Correct Answer: D

Explanation:

Colour does not affect evaporation

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Question (15)

QN004804

A plate has more exposed water than a bottle cap. If both are kept together, then:

(A) cap evaporates faster
(B) plate evaporates faster
(C) both same rate
(D) neither evaporates

Correct Answer: B

Explanation:

Larger surface area evaporates faster

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Question (16)

QN004805

Which condition will make evaporation fastest?

(A) Small surface area, no wind, humid air
(B) Large surface area, wind, hot temperature
(C) Covered water, cold air, humid air
(D) Deep container, still air, rainy weather

Correct Answer: B

Explanation:

All factors favour evaporation

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Question (17)

QN004806

When humidity in air increases, evaporation becomes:

(A) faster
(B) slower
(C) unchanged
(D) turns into freezing

Correct Answer: B

Explanation:

Air already has water vapour so evaporation slows

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Question (18)

QN004807

Which everyday activity is based on evaporation?

(A) melting ice
(B) drying wet clothes
(C) freezing water
(D) breaking glass

Correct Answer: B

Explanation:

Clothes dry due to evaporation

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Question (19)

QN004808

If two identical plates have equal water but one is kept in shade and other in sunlight, then evaporation is:

(A) faster in shade
(B) faster in sunlight
(C) same in both
(D) stops in both

Correct Answer: B

Explanation:

Sunlight increases temperature

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Question (20)

QN004809

A fan helps in drying clothes because it:

(A) cools water into ice
(B) increases air movement
(C) increases humidity
(D) reduces temperature only

Correct Answer: B

Explanation:

Moving air removes water vapour

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Question (11)

Which of the following will evaporate slowest?

Explanation:

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Question (12)

Increasing air movement generally causes evaporation to:

Explanation:

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Question (13)

Evaporation takes place:

Explanation:

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Question (14)

Which of the following is NOT a factor affecting evaporation?

Explanation:

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Question (15)

A plate has more exposed water than a bottle cap. If both are kept together, then:

Explanation:

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Question (16)

Which condition will make evaporation fastest?

Explanation:

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Question (17)

When humidity in air increases, evaporation becomes:

Explanation:

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Question (18)

Which everyday activity is based on evaporation?

Explanation:

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Question (19)

If two identical plates have equal water but one is kept in shade and other in sunlight, then evaporation is:

Explanation:

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Question (20)

A fan helps in drying clothes because it:

Explanation:

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