Question

select the correct answer.
when a perfume bottle is opened, some liquid changes to gas and the fragrance spreads around the room. which sentence explains this?
a. gases do not have a definite volume.
b. the particles of gases are closely packed.
c. the force of attraction between particles in gases is very high.
d. gases are not matter.

Explanation:

• Option A: Gases do not have a definite volume. This means they can spread out to fill the available space (the room in this case), which explains why the perfume fragrance (in gas form) spreads around the room.
• Option B: The particles of gases are not closely - packed. In fact, gas particles are far apart, so this option is incorrect.
• Option C: The force of attraction between particles in gases is very low (not high). High inter - particle forces would keep the particles together and not allow the gas to spread, so this option is wrong.
• Option D: Gases are matter (they have mass and occupy space), so this option is incorrect.

Answer:

A. Gases do not have a definite volume.