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Question

Which of the following is/are the reasons why air molecules rush out when a balloon's neck is opened?

A
More number of air molecules are present inside the ballon.
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B
Air moves from high pressure regions to low pressure regions.
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C
Air pressure outside an inflated balloon is higher.
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D
Temperature of the air inside the balloon is lower.
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Solution

The correct options are
A More number of air molecules are present inside the ballon.
B Air moves from high pressure regions to low pressure regions.
When we blow air into the balloon, more air molecules get compressed in a small space and they exert an outward pressure on the walls of the balloon. Therefore, air pressure inside the balloon is high compared to outside.

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