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Question (1)

QN0028976

A student compresses air in a syringe from 60 mL to 20 mL. Which conclusion is correct?

(A) Air particles become smaller
(B) Interparticle spaces decrease
(C) Air changes into liquid
(D) Number of particles decreases

Correct Answer: B

Explanation:

Compression reduces spaces between gas particles.

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Question (2)

QN0028977

A solid substance has very high melting point and fixed shape. This indicates that its particles have:

(A) Weak attraction
(B) Large spaces
(C) Strong interparticle attraction
(D) No movement

Correct Answer: C

Explanation:

Strong attraction keeps particles tightly packed.

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Question (3)

QN0028978

When sugar dissolves completely in water without much increase in water level, it proves that:

(A) Sugar has no mass
(B) Water particles have spaces between them
(C) Sugar changes into gas
(D) Water evaporates during mixing

Correct Answer: B

Explanation:

Sugar particles occupy interparticle spaces.

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Question (4)

QN0028979

A drop of ink spreads faster in hot water than in cold water because:

(A) Ink particles melt in hot water
(B) Particle movement increases with temperature
(C) Water particles stop moving in cold water
(D) Ink becomes lighter in hot water

Correct Answer: B

Explanation:

Heating increases kinetic energy of particles.

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Question (5)

QN0028980

Which arrangement correctly represents increasing freedom of particle movement?

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

Correct Answer: B

Explanation:

Particle movement is minimum in solids and maximum in gases.

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Question (6)

QN0028981

A perfume bottle opened in one corner of a room can be smelled across the room because of:

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

Correct Answer: C

Explanation:

Gas particles move continuously and spread.

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Question (7)

QN0028982

Which property is common to both liquids and gases?

(A) Fixed shape
(B) Ability to flow
(C) Fixed volume
(D) Strongest attraction

Correct Answer: B

Explanation:

Liquids and gases are called fluids because they flow.

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Question (8)

QN0028983

Why are solids difficult to compress?

(A) Their particles are very far apart
(B) Their particles are tightly packed
(C) Their particles move freely
(D) They contain no spaces at all

Correct Answer: B

Explanation:

Very little interparticle space exists in solids.

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Question (9)

QN0028984

A gas completely fills a balloon because gas particles:

(A) Are fixed in position
(B) Have no mass
(C) Move freely in all directions
(D) Are tightly packed

Correct Answer: C

Explanation:

Gas particles occupy all available space.

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Question (10)

QN0028985

Which state of matter has definite volume but no definite shape?

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

Correct Answer: B

Explanation:

Liquids take the shape of their container.

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Question (1)

A student compresses air in a syringe from 60 mL to 20 mL. Which conclusion is correct?

Explanation:

Link:

Question (2)

A solid substance has very high melting point and fixed shape. This indicates that its particles have:

Explanation:

Link:

Question (3)

When sugar dissolves completely in water without much increase in water level, it proves that:

Explanation:

Link:

Question (4)

A drop of ink spreads faster in hot water than in cold water because:

Explanation:

Link:

Question (5)

Which arrangement correctly represents increasing freedom of particle movement?

Explanation:

Link:

Question (6)

A perfume bottle opened in one corner of a room can be smelled across the room because of:

Explanation:

Link:

Question (7)

Which property is common to both liquids and gases?

Explanation:

Link:

Question (8)

Why are solids difficult to compress?

Explanation:

Link:

Question (9)

A gas completely fills a balloon because gas particles:

Explanation:

Link:

Question (10)

Which state of matter has definite volume but no definite shape?

Explanation:

Link:

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