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Question
A balloon inflates when air is pumped into it. Which of the following conclusions can be derived from this?
Options:
A .  Gases exert pressure.
B .  Gases don't exert pressure.
C .  Gases don't have any mass.
D .  Gases are heavier than solids.
Answer: Option A
:
A
Gases exert pressure on the walls of the container they are stored in. This pressure changes the shape of the balloon causing it to inflate.

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