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.
• B. Air moves from high pressure regions to low pressure regions.
• C. Air pressure outside an inflated balloon is higher.
• D. Temperature of the air inside the balloon is lower.

Answer 1

Answer: (A), (B)

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.