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Question (11)

QN004520

Which of the following is a non-lustrous material?

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

Correct Answer: D

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Question (12)

QN004521

A freshly cut iron surface appears shinier than an old iron surface because

(A) iron changes into gold
(B) air and moisture can make metals lose lustre
(C) cutting creates colour
(D) iron becomes lighter

Correct Answer: B

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Question (13)

QN004522

Which statement is correct?

(A) All shiny materials are metals
(B) All metals are transparent
(C) Some non-metals may appear shiny due to polishing or coating
(D) Only gold has lustre

Correct Answer: C

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Question (14)

QN004523

A material that can be compressed easily is generally classified as

(A) hard
(B) lustrous
(C) soft
(D) transparent

Correct Answer: C

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Question (15)

QN004524

Which pair correctly shows increasing hardness?

(A) Iron → Rubber → Sponge
(B) Sponge → Rubber → Iron
(C) Rubber → Iron → Sponge
(D) Sponge → Iron → Rubber

Correct Answer: B

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Question (16)

QN004525

If a key scratches a candle easily but cannot scratch a stone, which conclusion is correct?

(A) Candle is harder than stone
(B) Stone is softer than candle
(C) Candle is softer than stone
(D) Both have equal hardness

Correct Answer: C

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Question (17)

QN004526

Rubber is compared with sponge and iron. Which statement is true?

(A) Rubber is softer than sponge and iron
(B) Rubber is harder than sponge but softer than iron
(C) Rubber is harder than iron
(D) All three have equal hardness

Correct Answer: B

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Question (18)

QN004527

Through which material can objects be seen clearly?

(A) Transparent material
(B) Opaque material
(C) Hard material
(D) Soft material

Correct Answer: A

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Question (19)

QN004528

A child looks through a clean glass window and clearly sees a garden outside. The glass is

(A) opaque
(B) translucent
(C) transparent
(D) soluble

Correct Answer: C

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Question (20)

QN004529

Which of the following is translucent?

(A) Wooden board
(B) Frosted glass
(C) Metal sheet
(D) Brick

Correct Answer: B

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Question (11)

Which of the following is a non-lustrous material?

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Question (12)

A freshly cut iron surface appears shinier than an old iron surface because

Explanation:

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Question (13)

Which statement is correct?

Explanation:

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Question (14)

A material that can be compressed easily is generally classified as

Explanation:

Link:

Question (15)

Which pair correctly shows increasing hardness?

Explanation:

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Question (16)

If a key scratches a candle easily but cannot scratch a stone, which conclusion is correct?

Explanation:

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Question (17)

Rubber is compared with sponge and iron. Which statement is true?

Explanation:

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Question (18)

Through which material can objects be seen clearly?

Explanation:

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Question (19)

A child looks through a clean glass window and clearly sees a garden outside. The glass is

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Question (20)

Which of the following is translucent?

Explanation:

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