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Chem Whiz

Chem Whiz

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Chem Whiz

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20 soalan

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# 1
Which of the following statements correctly describes the arrangement of particles in a solid?
a) Particles are closely packed and vibrate in fixed positions.
b) Particles move freely and are far apart.
c) Particles slide past each other but are still close together.
d) Particles collide randomly with each other in all directions.
# 2
Which change of state occurs when a solid turns directly into a gas without becoming a liquid?
a) Melting
b) Evaporation
c) Sublimation
d) Condensation
# 3
What happens to the movement of gas particles when the temperature increases?
a) They move slower and closer together.
b) They move faster and further apart.
c) They remain at the same speed but change direction more often.
d) They stop moving.
# 4
Which of the following explains why gases can be compressed easily?
a) Gas particles have a strong attraction to each other.
b) Gas particles are widely spaced apart.
c) Gas particles do not move.
d) Gas particles form rigid structures under pressure.
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