Question

Assertion(A): A balloon filled with air and tightly tied, when hung close to the source of heat, bursts after some time.

Reason (R): The pressure exerted by the gas is inversely proportional to the temperature of the gas.

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true, but R is not the correct explanation of A.
• C. A is true and R is false.
• D. A is false and R is true.

Answer 1

The correct option is C

A is true and R is false.

Explanation of the correct option:

Assertion (A):

• When a tightly filled balloon is held close to the source of heat, then the molecules inside the balloon start to move faster since the heat provides excess kinetic energy.
• This leads to an increase in pressure inside the balloon.
• Ultimately the balloon expands and bursts.

So, the assertion statement is correct.

Reason (R):

• As mentioned above, pressure increases with the increase in temperature. So, the statement given for the reason is false.

Hence, the correct option is (C).