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Question (21)

QN004810

Which situation will show the slowest evaporation?

(A) Hot windy day
(B) Dry sunny day
(C) Cold humid day
(D) Open plate under fan

Correct Answer: C

Explanation:

Low temperature + high humidity slow evaporation

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Question (22)

QN004811

If surface area is doubled, evaporation rate generally:

(A) decreases
(B) increases
(C) becomes zero
(D) remains unchanged

Correct Answer: B

Explanation:

More surface area allows more evaporation

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Question (23)

QN004812

Water in a bottle cap takes 30 minutes to evaporate. In a plate it may take:

(A) more time
(B) less time
(C) same time
(D) infinite time

Correct Answer: B

Explanation:

Larger surface area reduces time

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Question (24)

QN004813

Which factor is MOST responsible for faster drying of wet floor?

(A) less light
(B) air movement
(C) solid surface
(D) gravity

Correct Answer: B

Explanation:

Air movement increases evaporation

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Question (25)

QN004814

Evaporation is a process in which water:

(A) becomes ice
(B) becomes vapour
(C) becomes solid
(D) becomes plasma

Correct Answer: B

Explanation:

Liquid water changes to vapour

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Question (26)

QN004815

A wet cloth dries faster when it is spread because:

(A) temperature decreases
(B) surface area increases
(C) humidity increases
(D) wind stops

Correct Answer: B

Explanation:

Spread cloth increases surface area

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Question (27)

QN004816

In which case evaporation is slowest?

(A) Plate in sunlight
(B) Plate under fan
(C) Covered container
(D) Wide open plate

Correct Answer: C

Explanation:

Covered container reduces evaporation

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Question (28)

QN004817

Which combination increases evaporation most?

(A) High humidity + low temperature
(B) Wind + high temperature + large surface area
(C) Closed container + no wind
(D) Rainy weather + shade

Correct Answer: B

Explanation:

All favorable conditions present

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Question (29)

QN004818

Evaporation causes cooling because:

(A) heat is released
(B) heat is absorbed from surroundings
(C) water becomes solid
(D) air becomes heavier

Correct Answer: B

Explanation:

Heat is taken from surroundings

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Question (30)

QN004819

Water evaporates faster from a wet hand when:

(A) left still in air
(B) rubbed with wind/fan
(C) kept in water
(D) covered with cloth

Correct Answer: B

Explanation:

Air movement increases evaporation

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Question (21)

Which situation will show the slowest evaporation?

Explanation:

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Question (22)

If surface area is doubled, evaporation rate generally:

Explanation:

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Question (23)

Water in a bottle cap takes 30 minutes to evaporate. In a plate it may take:

Explanation:

Link:

Question (24)

Which factor is MOST responsible for faster drying of wet floor?

Explanation:

Link:

Question (25)

Evaporation is a process in which water:

Explanation:

Link:

Question (26)

A wet cloth dries faster when it is spread because:

Explanation:

Link:

Question (27)

In which case evaporation is slowest?

Explanation:

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Question (28)

Which combination increases evaporation most?

Explanation:

Link:

Question (29)

Evaporation causes cooling because:

Explanation:

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Question (30)

Water evaporates faster from a wet hand when:

Explanation:

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