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Question (11)

QN0028986

A student notices that the smell of food spreads more quickly in summer than in winter. This is because:

(A) Air becomes lighter in summer
(B) Particle motion increases at higher temperature
(C) Food particles disappear faster
(D) Gases stop moving in winter

Correct Answer: B

Explanation:

Higher temperature increases diffusion rate.

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Question (12)

QN0028987

Which state of matter has the least interparticle spacing?

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

Correct Answer: C

Explanation:

Solid particles are most closely packed.

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Question (13)

QN0028988

During melting, particles of a solid:

(A) Lose energy completely
(B) Become fixed permanently
(C) Gain enough energy to move past one another
(D) Change directly into gas

Correct Answer: C

Explanation:

Heating weakens interparticle attraction.

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Question (14)

QN0028989

Which observation best demonstrates diffusion in liquids?

(A) Smoke spreading in air
(B) Ink spreading in water
(C) Hammering iron
(D) Ice floating on water

Correct Answer: B

Explanation:

Diffusion occurs due to movement of liquid particles.

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Question (15)

QN0028990

A metal spoon remains solid at room temperature mainly because:

(A) Its particles have weak attraction
(B) Its particles are closely packed with strong attraction
(C) Metal contains no particles
(D) Its particles move freely

Correct Answer: B

Explanation:

Strong attraction maintains the solid state.

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Question (16)

QN0028991

Which of the following has maximum compressibility?

(A) Stone
(B) Water
(C) Air
(D) Ice

Correct Answer: C

Explanation:

Gases have maximum interparticle spaces.

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Question (17)

QN0028992

Why can liquids flow but solids cannot?

(A) Liquids contain no particles
(B) Liquid particles can slide past one another
(C) Solid particles are heavier
(D) Solids contain no energy

Correct Answer: B

Explanation:

Liquid particles have moderate freedom of movement.

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Question (18)

QN0028993

If the particles of a substance are very far apart with negligible attraction, the substance is most likely a:

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

Correct Answer: C

Explanation:

Gas particles have maximum spacing and least attraction.

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Question (19)

QN0028994

A crystal of potassium permanganate colours an entire beaker of water after some time due to:

(A) Compression
(B) Filtration
(C) Diffusion
(D) Reflection

Correct Answer: C

Explanation:

Particles spread from higher concentration to lower concentration.

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Question (20)

QN0028995

Which statement correctly compares particle motion in the three states of matter?

(A) Solids > Liquids > Gases
(B) Liquids > Gases > Solids
(C) Gases > Liquids > Solids
(D) All states have equal particle motion

Correct Answer: C

Explanation:

Particle motion is maximum in gases and minimum in solids.

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Question (11)

A student notices that the smell of food spreads more quickly in summer than in winter. This is because:

Explanation:

Link:

Question (12)

Which state of matter has the least interparticle spacing?

Explanation:

Link:

Question (13)

During melting, particles of a solid:

Explanation:

Link:

Question (14)

Which observation best demonstrates diffusion in liquids?

Explanation:

Link:

Question (15)

A metal spoon remains solid at room temperature mainly because:

Explanation:

Link:

Question (16)

Which of the following has maximum compressibility?

Explanation:

Link:

Question (17)

Why can liquids flow but solids cannot?

Explanation:

Link:

Question (18)

If the particles of a substance are very far apart with negligible attraction, the substance is most likely a:

Explanation:

Link:

Question (19)

A crystal of potassium permanganate colours an entire beaker of water after some time due to:

Explanation:

Link:

Question (20)

Which statement correctly compares particle motion in the three states of matter?

Explanation:

Link:

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