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Question (31)

QN002581

If the particles of a substance are tightly packed and cannot move past one another, the substance is most likely a:

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

Correct Answer: C

Explanation:

In solids, particles are tightly packed and fixed.

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Question (32)

QN002582

Why are gases easily compressible?

(A) Their particles are fixed
(B) Their particles have large spaces between them
(C) Their particles have maximum attraction
(D) They have no mass

Correct Answer: B

Explanation:

Large interparticle spaces allow compression.

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Question (33)

QN002583

Which statement is true about boiling?

(A) Vapour forms only at the surface
(B) Vapour forms throughout the liquid rapidly
(C) It occurs only below boiling point
(D) It decreases particle movement

Correct Answer: B

Explanation:

During boiling, vapour forms rapidly throughout the liquid.

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Question (34)

QN002584

Liquids flow because:

(A) Their particles can slide past one another
(B) Their particles are tightly fixed
(C) They have no interparticle attraction
(D) Their particles are motionless

Correct Answer: A

Explanation:

Liquid particles can slide over each other.

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Question (35)

QN002585

A gas completely fills a balloon because gas particles:

(A) Have fixed positions
(B) Move freely and occupy all space available
(C) Are closely packed
(D) Do not move at all

Correct Answer: B

Explanation:

Gas particles spread to occupy available space.

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Question (36)

QN002586

Acharya Kanad suggested that matter is made of tiny indivisible particles called:

(A) Molecules
(B) Electrons
(C) Parmanu
(D) Cells

Correct Answer: C

Explanation:

Acharya Kanad named tiny particles Parmanu.

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Question (37)

QN002587

Which state of matter has the strongest interparticle attraction?

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

Correct Answer: C

Explanation:

Solids have strongest interparticle attraction.

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Question (38)

QN002588

Which activity best demonstrates that gases occupy all available space?

(A) Grinding chalk
(B) Dissolving sugar in water
(C) Smoke spreading in connected gas jars
(D) Hammering an iron nail

Correct Answer: C

Explanation:

Smoke spreads throughout both gas jars.

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Question (39)

QN002589

Water sticking slightly to container walls after pouring is mainly due to:

(A) Loss of mass
(B) Change in colour
(C) Small quantity remaining attached to surface
(D) Boiling of water

Correct Answer: C

Explanation:

Some water remains attached to the container walls.

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Question (40)

QN002590

Which statement correctly compares the three states of matter?

(A) Solids have weakest attraction and gases strongest
(B) Liquids have stronger attraction than solids
(C) Gases have negligible attraction compared to solids and liquids
(D) All states have equal interparticle attraction

Correct Answer: C

Explanation:

Gases have minimum interparticle attraction.

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Question (31)

If the particles of a substance are tightly packed and cannot move past one another, the substance is most likely a:

Explanation:

Link:

Question (32)

Why are gases easily compressible?

Explanation:

Link:

Question (33)

Which statement is true about boiling?

Explanation:

Link:

Question (34)

Liquids flow because:

Explanation:

Link:

Question (35)

A gas completely fills a balloon because gas particles:

Explanation:

Link:

Question (36)

Acharya Kanad suggested that matter is made of tiny indivisible particles called:

Explanation:

Link:

Question (37)

Which state of matter has the strongest interparticle attraction?

Explanation:

Link:

Question (38)

Which activity best demonstrates that gases occupy all available space?

Explanation:

Link:

Question (39)

Water sticking slightly to container walls after pouring is mainly due to:

Explanation:

Link:

Question (40)

Which statement correctly compares the three states of matter?

Explanation:

Link:

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