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Question (31)

QN0029203

A solid occupies 75 cm³ and has a mass of 225 g. Calculate its density.

(A) 2 g/cm³
(B) 3 g/cm³
(C) 4 g/cm³
(D) 5 g/cm³

Correct Answer: B

Explanation:

Density = 225 ÷ 75 = 3 g/cm³.

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Question (32)

QN0029204

A liquid has density 0.9 g/cm³. What is the mass of 300 cm³ of the liquid?

(A) 240 g
(B) 250 g
(C) 270 g
(D) 300 g

Correct Answer: C

Explanation:

Mass = 0.9 × 300 = 270 g.

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Question (33)

QN0029205

Which sample has density equal to 1 g/cm³?

(A) 50 g in 100 cm³
(B) 80 g in 40 cm³
(C) 120 g in 120 cm³
(D) 180 g in 90 cm³

Correct Answer: C

Explanation:

Density = 120 ÷ 120 = 1 g/cm³.

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Question (34)

QN0029206

An object has mass 640 g and volume 320 cm³. Its density is:

(A) 1 g/cm³
(B) 1.5 g/cm³
(C) 2 g/cm³
(D) 2.5 g/cm³

Correct Answer: C

Explanation:

Density = 640 ÷ 320 = 2 g/cm³.

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Question (35)

QN0029207

If volume increases while mass remains constant, density will:

(A) increase
(B) decrease
(C) remain same
(D) double

Correct Answer: B

Explanation:

Density decreases when volume increases at constant mass.

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Question (36)

QN0029208

A material has density 1.25 g/cm³ and volume 160 cm³. Its mass is:

(A) 180 g
(B) 190 g
(C) 200 g
(D) 220 g

Correct Answer: C

Explanation:

Mass = 1.25 × 160 = 200 g.

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Question (37)

QN0029209

A block has mass 144 g and density 1.2 g/cm³. What is its volume?

(A) 100 cm³
(B) 110 cm³
(C) 120 cm³
(D) 130 cm³

Correct Answer: C

Explanation:

Volume = 144 ÷ 1.2 = 120 cm³.

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Question (38)

QN0029210

Which of the following has density 0.5 g/cm³?

(A) 50 g in 25 cm³
(B) 40 g in 80 cm³
(C) 120 g in 60 cm³
(D) 150 g in 75 cm³

Correct Answer: B

Explanation:

Density = 40 ÷ 80 = 0.5 g/cm³.

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Question (39)

QN0029211

A sample occupies 500 cm³ and has density 0.6 g/cm³. Its mass is:

(A) 250 g
(B) 280 g
(C) 300 g
(D) 320 g

Correct Answer: C

Explanation:

Mass = 0.6 × 500 = 300 g.

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Question (40)

QN0029212

Why is density useful in science?

(A) It measures colour intensity
(B) It helps compare and identify substances based on mass and volume
(C) It determines temperature directly
(D) It measures only size

Correct Answer: B

Explanation:

Density is a characteristic property used to identify and compare substances.

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Question (31)

A solid occupies 75 cm³ and has a mass of 225 g. Calculate its density.

Explanation:

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Question (32)

A liquid has density 0.9 g/cm³. What is the mass of 300 cm³ of the liquid?

Explanation:

Link:

Question (33)

Which sample has density equal to 1 g/cm³?

Explanation:

Link:

Question (34)

An object has mass 640 g and volume 320 cm³. Its density is:

Explanation:

Link:

Question (35)

If volume increases while mass remains constant, density will:

Explanation:

Link:

Question (36)

A material has density 1.25 g/cm³ and volume 160 cm³. Its mass is:

Explanation:

Link:

Question (37)

A block has mass 144 g and density 1.2 g/cm³. What is its volume?

Explanation:

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Question (38)

Which of the following has density 0.5 g/cm³?

Explanation:

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Question (39)

A sample occupies 500 cm³ and has density 0.6 g/cm³. Its mass is:

Explanation:

Link:

Question (40)

Why is density useful in science?

Explanation:

Link:

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