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Question (31)

QN00171

Why are metal pans often provided with plastic or wooden handles?

(A) To make them colourful
(B) To reduce their weight
(C) To prevent heat from reaching the hand quickly
(D) To increase heat transfer

Correct Answer: C

Explanation:

Plastic and wood are poor conductors of heat.

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Question (32)

QN00172

In the conduction process, particles of the material —

(A) move freely throughout the object
(B) remain at their positions
(C) escape into air
(D) disappear after heating

Correct Answer: B

Explanation:

Particles only transfer energy to neighbours.

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Question (33)

QN00173

Which of the following would conduct heat the slowest?

(A) Iron
(B) Aluminium
(C) Wood
(D) Copper

Correct Answer: C

Explanation:

Wood is a poor conductor of heat.

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Question (34)

QN00174

A child accidentally touches a hot steel ruler and quickly withdraws the hand. Which property of steel is responsible for this?

(A) Transparency
(B) Poor conductivity
(C) Good conductivity of heat
(D) Elasticity

Correct Answer: C

Explanation:

Steel transfers heat rapidly.

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Question (35)

QN00175

Which option correctly explains why clay cups are preferred for serving hot tea?

(A) Clay melts slowly
(B) Clay reflects heat completely
(C) Clay is a poor conductor of heat
(D) Clay increases the temperature of tea

Correct Answer: C

Explanation:

Clay slows down heat transfer.

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Question (36)

QN00176

A metal strip is heated continuously at one end. Which end will have the highest temperature after some time?

(A) The heated end
(B) The farthest end
(C) Both ends equally
(D) Middle only

Correct Answer: A

Explanation:

The heated end receives maximum heat directly.

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Question (37)

QN00177

A school bag made with foam padding feels comfortable because foam —

(A) is a good conductor of heat
(B) traps air and reduces heat transfer
(C) produces heat
(D) absorbs moisture only

Correct Answer: B

Explanation:

Foam contains trapped air which acts as an insulator.

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Question (38)

QN00178

Which observation best proves that metals are good conductors of heat?

(A) Metals are shiny
(B) Metals produce sound when struck
(C) Heat quickly spreads through a heated metal rod
(D) Metals can be bent easily

Correct Answer: C

Explanation:

Rapid heat transfer shows good conduction.

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Question (39)

QN00179

A cook wraps a hot vessel with a thick dry cloth before lifting it. The cloth protects the hand because it —

(A) increases heat transfer
(B) acts as an insulator
(C) melts quickly
(D) cools the vessel instantly

Correct Answer: B

Explanation:

Cloth is a poor conductor of heat.

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Question (40)

QN00180

Which everyday situation mainly demonstrates conduction of heat?

(A) Smoke rising from incense stick
(B) Warmth from the Sun reaching Earth
(C) A metal spoon becoming hot in tea
(D) Formation of clouds

Correct Answer: C

Explanation:

Heat transfers through the spoon by conduction.

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Question (31)

Why are metal pans often provided with plastic or wooden handles?

Explanation:

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Question (32)

In the conduction process, particles of the material —

Explanation:

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Question (33)

Which of the following would conduct heat the slowest?

Explanation:

Link:

Question (34)

A child accidentally touches a hot steel ruler and quickly withdraws the hand. Which property of steel is responsible for this?

Explanation:

Link:

Question (35)

Which option correctly explains why clay cups are preferred for serving hot tea?

Explanation:

Link:

Question (36)

A metal strip is heated continuously at one end. Which end will have the highest temperature after some time?

Explanation:

Link:

Question (37)

A school bag made with foam padding feels comfortable because foam —

Explanation:

Link:

Question (38)

Which observation best proves that metals are good conductors of heat?

Explanation:

Link:

Question (39)

A cook wraps a hot vessel with a thick dry cloth before lifting it. The cloth protects the hand because it —

Explanation:

Link:

Question (40)

Which everyday situation mainly demonstrates conduction of heat?

Explanation:

Link:

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