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Question (31)

QN002541

Which state of matter shows only vibrational movement of particles?

(A) Liquid
(B) Gas
(C) Plasma
(D) Solid

Correct Answer: D

Explanation:

In solids, particles only vibrate about fixed positions.

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Question (32)

QN002542

If all constituent particles were removed from a wooden chair, then:

(A) The chair would remain unchanged
(B) Only colour would disappear
(C) Nothing of the chair would remain
(D) The chair would become lighter but visible

Correct Answer: C

Explanation:

Matter is made of particles; removing them removes the object itself.

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Question (33)

QN002543

A closed syringe containing air returns to its original shape after pressure is released because gas particles:

(A) Spread apart again
(B) Become liquids
(C) Stop moving
(D) Stick permanently together

Correct Answer: A

Explanation:

Gas particles spread out again when pressure is removed.

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Question (34)

QN002544

Which example best represents negligible interparticle attraction?

(A) Ice cube
(B) Cooking oil
(C) Steam
(D) Rock salt

Correct Answer: C

Explanation:

Gases like steam have negligible interparticle attraction.

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Question (35)

QN002545

A student transfers 200 mL water from one container to another of different shape. The water level changes shape but volume remains same. This proves that liquids:

(A) Have fixed shape and volume
(B) Have no fixed shape but definite volume
(C) Have no volume
(D) Expand automatically in every container

Correct Answer: B

Explanation:

Liquids change shape according to container but retain volume.

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Question (36)

QN002546

Why can a finger move through water but not through a wooden block easily?

(A) Water particles are larger
(B) Wood has no spaces
(C) Interparticle attraction in liquids is weaker than in solids
(D) Water is lighter than wood

Correct Answer: C

Explanation:

Liquid particles can move aside due to weaker attraction.

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Question (37)

QN002547

Which situation best demonstrates interparticle spaces in liquids?

(A) Melting of iron
(B) Compression of air
(C) Dissolving sugar in water without much rise in level
(D) Breaking of glass

Correct Answer: C

Explanation:

Sugar particles occupy spaces between water particles.

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Question (38)

QN002548

When a solid melts into a liquid, the particles:

(A) Become motionless
(B) Move farther apart than before
(C) Lose all attraction completely
(D) Change into new particles

Correct Answer: B

Explanation:

Melting increases distance between particles.

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Question (39)

QN002549

Soap helps remove oily stains because soap particles:

(A) Destroy cloth fibres
(B) Convert oil into gas
(C) Surround oil particles and help water remove them
(D) Absorb all water from cloth

Correct Answer: C

Explanation:

Soap particles attach to oil and help wash it away.

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Question (40)

QN002550

Which statement about gases is correct?

(A) Gases have fixed shape but no fixed volume
(B) Gases have fixed volume but no fixed shape
(C) Gases have neither fixed shape nor fixed volume
(D) Gases cannot flow

Correct Answer: C

Explanation:

Gases have no fixed shape and no fixed volume.

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Question (31)

Which state of matter shows only vibrational movement of particles?

Explanation:

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Question (32)

If all constituent particles were removed from a wooden chair, then:

Explanation:

Link:

Question (33)

A closed syringe containing air returns to its original shape after pressure is released because gas particles:

Explanation:

Link:

Question (34)

Which example best represents negligible interparticle attraction?

Explanation:

Link:

Question (35)

A student transfers 200 mL water from one container to another of different shape. The water level changes shape but volume remains same. This proves that liquids:

Explanation:

Link:

Question (36)

Why can a finger move through water but not through a wooden block easily?

Explanation:

Link:

Question (37)

Which situation best demonstrates interparticle spaces in liquids?

Explanation:

Link:

Question (38)

When a solid melts into a liquid, the particles:

Explanation:

Link:

Question (39)

Soap helps remove oily stains because soap particles:

Explanation:

Link:

Question (40)

Which statement about gases is correct?

Explanation:

Link:

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