Question

Which of the following does not happen when you blow air into a balloon?

• A. More air molecules get packed into a smaller space
• B. The air molecules reduce the air pressure operating on the walls of the balloon
• C. The air molecules start exerting pressure on the walls of the balloon
• D. Air pressure changes inside the balloon

Answer 1

Answer: (A), (C), (D)

The correct options are
A More air molecules get packed into a smaller space
C The air molecules start exerting pressure on the walls of the balloon
D Air pressure changes inside the balloon

When we blow air into a balloon, more air molecules get packed into a smaller space and start exerting pressure on the walls of the balloon. Due to the change in the air pressure and the force created by the air molecules on the walls of the balloon, the balloon expands.