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Question (1)

QN004790

Which of the following correctly defines evaporation?

(A) Conversion of water into ice
(B) Conversion of water vapour into liquid water
(C) Conversion of water into its vapour state
(D) Conversion of ice into water

Correct Answer: C

Explanation:

Evaporation is conversion of liquid water into vapour

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Question (2)

QN004791

Which factor is directly mentioned as affecting the rate of evaporation?

(A) Colour of water
(B) Exposed surface area
(C) Shape of container only
(D) Depth of water only

Correct Answer: B

Explanation:

Larger exposed surface area increases evaporation rate

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Question (3)

QN004792

Evaporation will be fastest when water is kept in which condition?

(A) Small bottle cap
(B) Deep narrow bottle
(C) Wide open plate
(D) Closed bottle

Correct Answer: C

Explanation:

Wide surface area allows faster evaporation

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Question (4)

QN004793

Water evaporates faster on a hot day because:

(A) air is heavier
(B) temperature is higher
(C) water becomes solid
(D) humidity increases

Correct Answer: B

Explanation:

Higher temperature increases evaporation rate

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Question (5)

QN004794

Which situation shows slower evaporation?

(A) Windy day
(B) Hot sunny day
(C) Rainy humid day
(D) Dry day

Correct Answer: C

Explanation:

High humidity slows evaporation

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Question (6)

QN004795

Which of the following increases evaporation rate the most?

(A) Decreasing exposed area
(B) Increasing exposed area
(C) Covering water
(D) Cooling water

Correct Answer: B

Explanation:

Increased surface area speeds evaporation

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Question (7)

QN004796

Water spread on a plate evaporates faster than in a cup because:

(A) plate is colder
(B) plate increases surface area
(C) cup is heavier
(D) cup is open

Correct Answer: B

Explanation:

More exposed surface area in plate

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Question (8)

QN004797

On a windy day, clothes dry faster because:

(A) water freezes
(B) air movement increases evaporation
(C) humidity increases
(D) water becomes solid

Correct Answer: B

Explanation:

Wind removes water vapour from surface

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Question (9)

QN004798

Which condition reduces evaporation?

(A) Strong wind
(B) High humidity
(C) Large surface area
(D) High temperature

Correct Answer: B

Explanation:

Humid air slows evaporation

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Question (10)

QN004799

Sweating cools the body mainly due to:

(A) condensation
(B) evaporation of sweat
(C) freezing of sweat
(D) melting of sweat

Correct Answer: B

Explanation:

Evaporation absorbs heat from body

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Question (1)

Which of the following correctly defines evaporation?

Explanation:

Link:

Question (2)

Which factor is directly mentioned as affecting the rate of evaporation?

Explanation:

Link:

Question (3)

Evaporation will be fastest when water is kept in which condition?

Explanation:

Link:

Question (4)

Water evaporates faster on a hot day because:

Explanation:

Link:

Question (5)

Which situation shows slower evaporation?

Explanation:

Link:

Question (6)

Which of the following increases evaporation rate the most?

Explanation:

Link:

Question (7)

Water spread on a plate evaporates faster than in a cup because:

Explanation:

Link:

Question (8)

On a windy day, clothes dry faster because:

Explanation:

Link:

Question (9)

Which condition reduces evaporation?

Explanation:

Link:

Question (10)

Sweating cools the body mainly due to:

Explanation:

Link:

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