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Question (11)

QN004720

When boiling water is covered with a steel plate, water drops on the inner side of the plate are formed due to

(A) melting
(B) freezing
(C) condensation
(D) absorption

Correct Answer: C

Explanation:

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Question (12)

QN004721

In Activity 8.4, the glass tumbler was covered with a small steel plate mainly to

(A) prevent dust entry
(B) reduce spilling
(C) investigate the source of water droplets
(D) increase cooling

Correct Answer: C

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Question (13)

QN004722

In Activity 8.4, the mass of the setup was measured using a

(A) spring balance
(B) beam balance
(C) digital weighing balance
(D) weighing scale pan

Correct Answer: C

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Question (14)

QN004723

During Activity 8.4, mass readings were recorded after every

(A) 2 minutes
(B) 5 minutes
(C) 10 minutes
(D) 15 minutes

Correct Answer: B

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Question (15)

QN004724

For how long were observations continued in Activity 8.4?

(A) 20 minutes
(B) 25 minutes
(C) 30 minutes
(D) 40 minutes

Correct Answer: C

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Question (16)

QN004725

If water were leaking out of the tumbler, the marked water level inside the tumbler would

(A) rise
(B) remain unchanged due to condensation
(C) decrease
(D) become invisible

Correct Answer: C

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Question (17)

QN004726

A tumbler with ice water initially weighs 420 g. After 30 minutes, it weighs 426 g. The increase in mass is

(A) 2 g
(B) 4 g
(C) 6 g
(D) 8 g

Correct Answer: C

Explanation:

426 − 420 = 6 g

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Question (18)

QN004727

A setup shows a mass increase from 500 g to 507 g. What is the increase in mass?

(A) 5 g
(B) 6 g
(C) 7 g
(D) 8 g

Correct Answer: C

Explanation:

507 − 500 = 7 g

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Question (19)

QN004728

A tumbler gains 12 g due to condensation. If its initial mass was 350 g, the final mass becomes

(A) 338 g
(B) 350 g
(C) 362 g
(D) 372 g

Correct Answer: C

Explanation:

350 + 12 = 362 g

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Question (20)

QN004729

A digital balance shows readings of 600 g and later 609 g. What percentage increase in mass occurred?

(A) 1.5%
(B) 2%
(C) 3%
(D) 4%

Correct Answer: A

Explanation:

(9/600) × 100 = 1.5%

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Question (11)

When boiling water is covered with a steel plate, water drops on the inner side of the plate are formed due to

Explanation:

Link:

Question (12)

In Activity 8.4, the glass tumbler was covered with a small steel plate mainly to

Explanation:

Link:

Question (13)

In Activity 8.4, the mass of the setup was measured using a

Explanation:

Link:

Question (14)

During Activity 8.4, mass readings were recorded after every

Explanation:

Link:

Question (15)

For how long were observations continued in Activity 8.4?

Explanation:

Link:

Question (16)

If water were leaking out of the tumbler, the marked water level inside the tumbler would

Explanation:

Link:

Question (17)

A tumbler with ice water initially weighs 420 g. After 30 minutes, it weighs 426 g. The increase in mass is

Explanation:

Link:

Question (18)

A setup shows a mass increase from 500 g to 507 g. What is the increase in mass?

Explanation:

Link:

Question (19)

A tumbler gains 12 g due to condensation. If its initial mass was 350 g, the final mass becomes

Explanation:

Link:

Question (20)

A digital balance shows readings of 600 g and later 609 g. What percentage increase in mass occurred?

Explanation:

Link:

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