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Question (11)

QN00851

One gram of gold can be drawn into approximately how long a wire?

(A) 20 m
(B) 200 m
(C) 2 km
(D) 20 km

Correct Answer: C

Explanation:

Gold is highly ductile and can form a 2 km long wire.

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Question (12)

QN00852

Steel ropes are used in suspension bridges mainly because steel wires are:

(A) Acidic
(B) Ductile and strong
(C) Brittle
(D) Non-conducting

Correct Answer: B

Explanation:

Steel wires can bear heavy loads due to strength and ductility.

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Question (13)

QN00853

Which object will produce a ringing sound when dropped on the floor?

(A) Wooden block
(B) Lump of sulfur
(C) Metal coin
(D) Piece of coal

Correct Answer: C

Explanation:

Metals produce ringing sounds due to sonority.

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Question (14)

QN00854

The property due to which school bells produce ringing sounds is called:

(A) Ductility
(B) Sonority
(C) Malleability
(D) Corrosion

Correct Answer: B

Explanation:

Sonorous materials produce ringing sounds.

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Question (15)

QN00855

Which statement correctly describes sonorous materials?

(A) They dissolve in water easily.
(B) They produce ringing sounds.
(C) They break into pieces on hammering.
(D) They do not conduct heat.

Correct Answer: B

Explanation:

Sonorous materials give ringing sounds when struck.

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Question (16)

QN00856

In an experiment, both a wooden spoon and a metal spoon are placed in hot water. Which spoon becomes hotter at the upper end?

(A) Wooden spoon
(B) Both equally
(C) Metal spoon
(D) Neither spoon

Correct Answer: C

Explanation:

Metals conduct heat faster than wood.

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Question (17)

QN00857

Heat transfer from one point to another in a material is called:

(A) Reflection
(B) Radiation
(C) Conduction
(D) Evaporation

Correct Answer: C

Explanation:

Transfer of heat through a material is called conduction.

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Question (18)

QN00858

Why are cooking vessels generally made of metals?

(A) Metals are soft
(B) Metals are brittle
(C) Metals are good conductors of heat
(D) Metals are poor conductors of heat

Correct Answer: C

Explanation:

Metals transfer heat efficiently during cooking.

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Question (19)

QN00859

Why are handles of cooking vessels often made of wood or plastic?

(A) They are shiny
(B) They are poor conductors of heat
(C) They are sonorous
(D) They are malleable

Correct Answer: B

Explanation:

Wood and plastic prevent heat transfer to hands.

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Question (20)

QN00860

Which of the following materials would make the bulb glow in a tester circuit?

(A) Rubber
(B) Nylon rope
(C) Copper wire
(D) Wood

Correct Answer: C

Explanation:

Copper is a good conductor of electricity.

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Question (11)

One gram of gold can be drawn into approximately how long a wire?

Explanation:

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Question (12)

Steel ropes are used in suspension bridges mainly because steel wires are:

Explanation:

Link:

Question (13)

Which object will produce a ringing sound when dropped on the floor?

Explanation:

Link:

Question (14)

The property due to which school bells produce ringing sounds is called:

Explanation:

Link:

Question (15)

Which statement correctly describes sonorous materials?

Explanation:

Link:

Question (16)

In an experiment, both a wooden spoon and a metal spoon are placed in hot water. Which spoon becomes hotter at the upper end?

Explanation:

Link:

Question (17)

Heat transfer from one point to another in a material is called:

Explanation:

Link:

Question (18)

Why are cooking vessels generally made of metals?

Explanation:

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Question (19)

Why are handles of cooking vessels often made of wood or plastic?

Explanation:

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Question (20)

Which of the following materials would make the bulb glow in a tester circuit?

Explanation:

Link:

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