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Question (11)

QN004912

Complete the sequence correctly: Ice → Water → Water Vapour occurs due to:

(A) Cooling only
(B) Heating only
(C) Filtering
(D) Mixing

Correct Answer: B

Explanation:

Heating changes ice to water and water to vapour.

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Question (12)

QN004913

Which change involves cooling?

(A) Water to vapour
(B) Ice to water
(C) Water to ice
(D) Wax to liquid wax

Correct Answer: C

Explanation:

Water changes to ice on cooling.

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Question (13)

QN004914

A tray contains 12 ice cubes. After melting, all become water. How many cubes remain in solid state?

(A) 12
(B) 6
(C) 1
(D) 0

Correct Answer: D

Explanation:

All cubes melt, so 0 remain solid.

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Question (14)

QN004915

A student melts 20 wax blocks. If 15 blocks melt completely, how many blocks remain solid?

(A) 3
(B) 4
(C) 5
(D) 6

Correct Answer: C

Explanation:

20 − 15 = 5 blocks remain solid.

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Question (15)

QN004916

A freezer contains 18 containers of water. If all freeze, how many containers contain ice?

(A) 0
(B) 9
(C) 18
(D) 36

Correct Answer: C

Explanation:

All 18 containers contain ice.

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Question (16)

QN004917

Out of 50 cups of water, 30 are placed in a freezer and freeze. How many cups remain liquid?

(A) 10
(B) 20
(C) 30
(D) 50

Correct Answer: B

Explanation:

50 − 30 = 20 cups remain liquid.

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Question (17)

QN004918

A laboratory has 40 ice cubes. If 25 melt, how many ice cubes are left?

(A) 10
(B) 15
(C) 20
(D) 25

Correct Answer: B

Explanation:

40 − 25 = 15 cubes left.

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Question (18)

QN004919

A student freezes 24 litres of water. If each litre becomes ice, how many litres of ice are formed?

(A) 12
(B) 18
(C) 24
(D) 48

Correct Answer: C

Explanation:

All 24 litres become ice.

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Question (19)

QN004920

If 36 ice cubes are taken out of a freezer and one-third melt, how many remain as ice?

(A) 12
(B) 18
(C) 24
(D) 30

Correct Answer: C

Explanation:

One-third of 36 = 12 melt; 36 − 12 = 24 remain.

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Question (20)

QN004921

A candle maker cools 48 units of liquid wax. If all solidify, how many units become solid wax?

(A) 24
(B) 36
(C) 48
(D) 96

Correct Answer: C

Explanation:

All 48 units become solid wax.

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Question (11)

Complete the sequence correctly: Ice → Water → Water Vapour occurs due to:

Explanation:

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Question (12)

Which change involves cooling?

Explanation:

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Question (13)

A tray contains 12 ice cubes. After melting, all become water. How many cubes remain in solid state?

Explanation:

Link:

Question (14)

A student melts 20 wax blocks. If 15 blocks melt completely, how many blocks remain solid?

Explanation:

Link:

Question (15)

A freezer contains 18 containers of water. If all freeze, how many containers contain ice?

Explanation:

Link:

Question (16)

Out of 50 cups of water, 30 are placed in a freezer and freeze. How many cups remain liquid?

Explanation:

Link:

Question (17)

A laboratory has 40 ice cubes. If 25 melt, how many ice cubes are left?

Explanation:

Link:

Question (18)

A student freezes 24 litres of water. If each litre becomes ice, how many litres of ice are formed?

Explanation:

Link:

Question (19)

If 36 ice cubes are taken out of a freezer and one-third melt, how many remain as ice?

Explanation:

Link:

Question (20)

A candle maker cools 48 units of liquid wax. If all solidify, how many units become solid wax?

Explanation:

Link:

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