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Question (1)

QN002631

In solids, particles mainly move by:

(A) Flowing freely
(B) Vibrating about fixed positions
(C) Moving randomly in all directions
(D) Rotating around the Earth

Correct Answer: B

Explanation:

Solid particles vibrate about fixed positions.

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Question (2)

QN002632

Which state of matter has particles with maximum freedom of movement?

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

Correct Answer: C

Explanation:

Gas particles move most freely.

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Question (3)

QN002633

A perfume sprayed in one corner of a room spreads throughout the room because gas particles:

(A) Are fixed in position
(B) Move continuously in all directions
(C) Have no mass
(D) Remain near the bottle

Correct Answer: B

Explanation:

Gas particles move continuously and spread everywhere.

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Question (4)

QN002634

The process by which particles spread from a region of higher concentration to lower concentration is called:

(A) Sublimation
(B) Condensation
(C) Diffusion
(D) Compression

Correct Answer: C

Explanation:

Diffusion is the spreading of particles due to motion.

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Question (5)

QN002635

Diffusion occurs fastest in:

(A) Solids
(B) Liquids
(C) Gases
(D) Ice

Correct Answer: C

Explanation:

Gas particles move fastest, so diffusion is fastest in gases.

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Question (6)

QN002636

Why does diffusion occur slowly in solids?

(A) Solid particles do not exist
(B) Solid particles are tightly packed and move very little
(C) Solids contain only air
(D) Solids have no attraction between particles

Correct Answer: B

Explanation:

Solid particles are tightly packed and cannot move freely.

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Question (7)

QN002637

A drop of ink spreads slowly in cold water but rapidly in hot water because:

(A) Ink particles disappear in hot water
(B) Particle movement increases with temperature
(C) Water particles stop moving in cold water
(D) Ink changes into gas in hot water

Correct Answer: B

Explanation:

Higher temperature increases particle motion.

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Question (8)

QN002638

Which observation best demonstrates diffusion in gases?

(A) Stone sinking in water
(B) Smell of food spreading through a house
(C) Melting of ice
(D) Boiling of milk

Correct Answer: B

Explanation:

Smell spreads due to diffusion of gas particles.

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Question (9)

QN002639

In liquids, particles can move:

(A) Only upward
(B) Freely in all directions without attraction
(C) By sliding past one another
(D) Without any motion

Correct Answer: C

Explanation:

Liquid particles slide past one another.

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Question (10)

QN002640

The movement of particles in gases is mainly:

(A) Fixed and regular
(B) Random and rapid
(C) Circular only
(D) Limited to vibrations

Correct Answer: B

Explanation:

Gas particles move rapidly and randomly.

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Question (1)

In solids, particles mainly move by:

Explanation:

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Question (2)

Which state of matter has particles with maximum freedom of movement?

Explanation:

Link:

Question (3)

A perfume sprayed in one corner of a room spreads throughout the room because gas particles:

Explanation:

Link:

Question (4)

The process by which particles spread from a region of higher concentration to lower concentration is called:

Explanation:

Link:

Question (5)

Diffusion occurs fastest in:

Explanation:

Link:

Question (6)

Why does diffusion occur slowly in solids?

Explanation:

Link:

Question (7)

A drop of ink spreads slowly in cold water but rapidly in hot water because:

Explanation:

Link:

Question (8)

Which observation best demonstrates diffusion in gases?

Explanation:

Link:

Question (9)

In liquids, particles can move:

Explanation:

Link:

Question (10)

The movement of particles in gases is mainly:

Explanation:

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