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Question (11)

QN0029143

An object has density exactly equal to that of water. It will most likely:

(A) float high above water
(B) sink rapidly
(C) remain suspended in water
(D) dissolve immediately

Correct Answer: C

Explanation:

Equal density causes the object to remain suspended.

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Question (12)

QN0029144

A cube has mass 150 g and volume 100 cm³. What will happen when placed in water?

(A) Float
(B) Sink
(C) Evaporate
(D) Melt

Correct Answer: B

Explanation:

Density = 150 ÷ 100 = 1.5 g/cm³, which is greater than water.

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Question (13)

QN0029145

Which property is most important in deciding whether an object floats or sinks?

(A) Colour
(B) Shape only
(C) Density
(D) Temperature

Correct Answer: C

Explanation:

Density determines floating and sinking.

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Question (14)

QN0029146

A piece of wax has density 0.9 g/cm³. What will it do in water?

(A) Sink
(B) Float
(C) Dissolve
(D) Break

Correct Answer: B

Explanation:

Its density is less than water.

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Question (15)

QN0029147

A solid has mass 300 g and volume 600 cm³. Its density is:

(A) 0.5 g/cm³
(B) 1.0 g/cm³
(C) 1.5 g/cm³
(D) 2.0 g/cm³

Correct Answer: A

Explanation:

Density = 300 ÷ 600 = 0.5 g/cm³.

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Question (16)

QN0029148

Why can a large ship float on water despite being very heavy?

(A) It is made of plastic
(B) Its overall average density is less than water
(C) Water pushes it upward continuously regardless of density
(D) It has engines

Correct Answer: B

Explanation:

The average density of the ship is less than that of water.

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Question (17)

QN0029149

Which object is most likely to sink?

(A) Density = 0.6 g/cm³
(B) Density = 0.8 g/cm³
(C) Density = 1.0 g/cm³
(D) Density = 1.4 g/cm³

Correct Answer: D

Explanation:

The highest density is greater than water.

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Question (18)

QN0029150

An object has mass 480 g and volume 400 cm³. Its density is:

(A) 0.8 g/cm³
(B) 1.0 g/cm³
(C) 1.2 g/cm³
(D) 1.5 g/cm³

Correct Answer: C

Explanation:

Density = 480 ÷ 400 = 1.2 g/cm³.

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Question (19)

QN0029151

Which statement is true?

(A) Every metal sinks in water
(B) Every wooden object floats in water
(C) Floating and sinking depend mainly on density
(D) Mass alone determines floating

Correct Answer: C

Explanation:

Density is the deciding factor.

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Question (20)

QN0029152

A block with density 0.75 g/cm³ is placed in water. It will:

(A) float
(B) sink
(C) disappear
(D) dissolve

Correct Answer: A

Explanation:

Density less than water causes floating.

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Question (11)

An object has density exactly equal to that of water. It will most likely:

Explanation:

Link:

Question (12)

A cube has mass 150 g and volume 100 cm³. What will happen when placed in water?

Explanation:

Link:

Question (13)

Which property is most important in deciding whether an object floats or sinks?

Explanation:

Link:

Question (14)

A piece of wax has density 0.9 g/cm³. What will it do in water?

Explanation:

Link:

Question (15)

A solid has mass 300 g and volume 600 cm³. Its density is:

Explanation:

Link:

Question (16)

Why can a large ship float on water despite being very heavy?

Explanation:

Link:

Question (17)

Which object is most likely to sink?

Explanation:

Link:

Question (18)

An object has mass 480 g and volume 400 cm³. Its density is:

Explanation:

Link:

Question (19)

Which statement is true?

Explanation:

Link:

Question (20)

A block with density 0.75 g/cm³ is placed in water. It will:

Explanation:

Link:

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