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Question (21)

QN002571

Solids and liquids differ mainly because solids have:

(A) Weaker interparticle attraction
(B) No volume
(C) Stronger interparticle attraction
(D) Faster particle movement

Correct Answer: C

Explanation:

Solids have stronger attractive forces between particles.

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Question (22)

QN002572

When a solid is heated to its melting point, particles begin to:

(A) Move away from fixed positions
(B) Stop vibrating
(C) Lose all energy
(D) Break into atoms immediately

Correct Answer: A

Explanation:

Heating weakens attraction and particles move from fixed positions.

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Question (23)

QN002573

Which of the following is an example of a fluid?

(A) Stone only
(B) Wood only
(C) Water and air
(D) Iron nail and rock salt

Correct Answer: C

Explanation:

Liquids and gases are called fluids because they can flow.

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Question (24)

QN002574

A substance with very strong interparticle attraction is expected to have:

(A) Low melting point
(B) High melting point
(C) No definite volume
(D) No particles

Correct Answer: B

Explanation:

Strong attraction requires higher temperature to melt.

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Question (25)

QN002575

In gases, particles move:

(A) Only upward
(B) Only downward
(C) In fixed paths
(D) Freely in all directions

Correct Answer: D

Explanation:

Gas particles move freely in all directions.

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Question (26)

QN002576

Which change correctly represents increasing particle freedom?

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

Correct Answer: B

Explanation:

Particle freedom increases from solid to liquid to gas.

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Question (27)

QN002577

Why does water regain its position after a finger is removed from it?

(A) Water particles are destroyed
(B) Liquids have restoring movement due to particle attraction
(C) Water changes into solid
(D) Finger pushes water permanently

Correct Answer: B

Explanation:

Liquid particles move back due to interparticle attraction.

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Question (28)

QN002578

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

(A) Solid
(B) Liquid
(C) Gas
(D) Solid and liquid equally

Correct Answer: C

Explanation:

Gas particles have maximum freedom of movement.

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Question (29)

QN002579

When heat is supplied to a liquid continuously, the particles:

(A) Lose motion gradually
(B) Move more vigorously
(C) Become fixed
(D) Decrease in size

Correct Answer: B

Explanation:

Heating increases particle movement.

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Question (30)

QN002580

Which of the following best explains melting?

(A) Increase in particle attraction
(B) Decrease in particle vibrations
(C) Weakening of interparticle attraction due to heating
(D) Formation of new particles

Correct Answer: C

Explanation:

Heating weakens attractive forces causing melting.

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Question (21)

Solids and liquids differ mainly because solids have:

Explanation:

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Question (22)

When a solid is heated to its melting point, particles begin to:

Explanation:

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Question (23)

Which of the following is an example of a fluid?

Explanation:

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Question (24)

A substance with very strong interparticle attraction is expected to have:

Explanation:

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Question (25)

In gases, particles move:

Explanation:

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Question (26)

Which change correctly represents increasing particle freedom?

Explanation:

Link:

Question (27)

Why does water regain its position after a finger is removed from it?

Explanation:

Link:

Question (28)

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

Explanation:

Link:

Question (29)

When heat is supplied to a liquid continuously, the particles:

Explanation:

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Question (30)

Which of the following best explains melting?

Explanation:

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