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Question (31)

QN002661

Which of the following has particles moving least rapidly?

(A) Steam
(B) Air
(C) Water
(D) Ice cube

Correct Answer: D

Explanation:

Solid particles move least rapidly.

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Question (32)

QN002662

Diffusion in solids is possible but very slow because solid particles:

(A) Are completely motionless
(B) Vibrate about fixed positions
(C) Move rapidly in all directions
(D) Have no energy

Correct Answer: B

Explanation:

Solid particles only vibrate about fixed positions.

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Question (33)

QN002663

Which observation directly shows continuous particle movement in liquids?

(A) Iron rusting
(B) Ink spreading in water without stirring
(C) Cutting wood
(D) Boiling oil only

Correct Answer: B

Explanation:

Ink spreads due to continuous movement of particles.

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Question (34)

QN002664

The rate of diffusion depends mainly on:

(A) Particle motion
(B) Colour of particles
(C) Shape of container only
(D) Smell of substance

Correct Answer: A

Explanation:

Faster particle motion increases diffusion.

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Question (35)

QN002665

Which state of matter allows particles to move freely and independently?

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

Correct Answer: C

Explanation:

Gas particles move freely in all directions.

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Question (36)

QN002666

A solid object maintains its shape because its particles:

(A) Continuously flow
(B) Remain close to fixed positions
(C) Have maximum spaces
(D) Move randomly everywhere

Correct Answer: B

Explanation:

Solid particles remain fixed in position.

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Question (37)

QN002667

In which state do particles possess moderate freedom of movement?

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

Correct Answer: B

Explanation:

Liquids have moderate particle freedom.

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Question (38)

QN002668

Why does smoke spread quickly in open air?

(A) Smoke particles are fixed
(B) Gas particles move rapidly and randomly
(C) Air particles stop moving
(D) Smoke particles are solid

Correct Answer: B

Explanation:

Rapid random motion causes quick spreading.

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Question (39)

QN002669

Which statement correctly compares movement of particles in three states?

(A) Solids > Liquids > Gases
(B) Gases > Liquids > Solids
(C) Liquids > Solids > Gases
(D) All have equal movement

Correct Answer: B

Explanation:

Particle movement is greatest in gases and least in solids.

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Question (40)

QN002670

Faster movement of particles generally leads to:

(A) Slower diffusion
(B) Increased diffusion rate
(C) Fixed particle positions
(D) Reduced mixing of substances

Correct Answer: B

Explanation:

Faster particles diffuse more rapidly.

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Question (31)

Which of the following has particles moving least rapidly?

Explanation:

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Question (32)

Diffusion in solids is possible but very slow because solid particles:

Explanation:

Link:

Question (33)

Which observation directly shows continuous particle movement in liquids?

Explanation:

Link:

Question (34)

The rate of diffusion depends mainly on:

Explanation:

Link:

Question (35)

Which state of matter allows particles to move freely and independently?

Explanation:

Link:

Question (36)

A solid object maintains its shape because its particles:

Explanation:

Link:

Question (37)

In which state do particles possess moderate freedom of movement?

Explanation:

Link:

Question (38)

Why does smoke spread quickly in open air?

Explanation:

Link:

Question (39)

Which statement correctly compares movement of particles in three states?

Explanation:

Link:

Question (40)

Faster movement of particles generally leads to:

Explanation:

Link:

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