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Question (1)

QN002551

The forces that hold constituent particles together in matter are called:

(A) Magnetic forces
(B) Frictional forces
(C) Interparticle attractions
(D) Muscular forces

Correct Answer: C

Explanation:

Attractive forces between particles are called interparticle attractions.

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Question (2)

QN002552

Which factor mainly decides the physical state of a substance?

(A) Shape of container
(B) Colour of substance
(C) Strength of interparticle attractions
(D) Mass of particles

Correct Answer: C

Explanation:

Physical state depends mainly on interparticle attraction.

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Question (3)

QN002553

In solids, particles are:

(A) Very far apart
(B) Completely free to move
(C) Tightly packed
(D) Without attraction

Correct Answer: C

Explanation:

Solid particles are tightly packed together.

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Question (4)

QN002554

Which state of matter has particles vibrating about fixed positions?

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

Correct Answer: C

Explanation:

Solid particles vibrate around fixed positions.

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Question (5)

QN002555

A student heats a metal rod continuously. Which change occurs first in its particles?

(A) Particles disappear
(B) Vibrations increase
(C) Particles stop moving
(D) Volume becomes zero

Correct Answer: B

Explanation:

Heating increases vibration of particles.

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Question (6)

QN002556

The temperature at which a solid changes into liquid is called:

(A) Boiling point
(B) Melting point
(C) Freezing point
(D) Condensation point

Correct Answer: B

Explanation:

Melting point is the temperature where solid changes to liquid.

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Question (7)

QN002557

Which substance among the following has the highest melting point?

(A) Ice
(B) Urea
(C) Iron
(D) Wax

Correct Answer: C

Explanation:

Iron has very strong interparticle attraction and highest melting point.

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Question (8)

QN002558

Ice melts at 0°C while urea melts at 133°C. This means:

(A) Ice has stronger interparticle attraction than urea
(B) Urea has stronger interparticle attraction than ice
(C) Both have equal attraction
(D) Ice is not a solid

Correct Answer: B

Explanation:

Higher melting point indicates stronger attraction.

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Question (9)

QN002559

Liquids have no fixed shape because their particles:

(A) Are fixed tightly
(B) Move freely within limited space
(C) Have no attraction
(D) Are extremely large

Correct Answer: B

Explanation:

Liquid particles can move within limited space.

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Question (10)

QN002560

Which property is common to both solids and liquids?

(A) Fixed shape
(B) No fixed volume
(C) Definite volume
(D) Complete freedom of particles

Correct Answer: C

Explanation:

Both solids and liquids have definite volume.

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Question (1)

The forces that hold constituent particles together in matter are called:

Explanation:

Link:

Question (2)

Which factor mainly decides the physical state of a substance?

Explanation:

Link:

Question (3)

In solids, particles are:

Explanation:

Link:

Question (4)

Which state of matter has particles vibrating about fixed positions?

Explanation:

Link:

Question (5)

A student heats a metal rod continuously. Which change occurs first in its particles?

Explanation:

Link:

Question (6)

The temperature at which a solid changes into liquid is called:

Explanation:

Link:

Question (7)

Which substance among the following has the highest melting point?

Explanation:

Link:

Question (8)

Ice melts at 0°C while urea melts at 133°C. This means:

Explanation:

Link:

Question (9)

Liquids have no fixed shape because their particles:

Explanation:

Link:

Question (10)

Which property is common to both solids and liquids?

Explanation:

Link:

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