Question

Assertion (A): A cooking gas cylinder, emptied under normal conditions, if kept in hot water, can still be used for some more time.

Reason (R): The pressure exerted by a gas is proportional to the number of collisions of gas molecules with the walls of the container.

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

Answer 1

The correct option is A

Both A and R are true and R is the correct explanation of A.

Explanation for Assertion:

• A cooking gas cylinder, emptied under normal conditions, if kept in hot water, can still be used for some more time.
• The gas will come out of the cylinder as long as the pressure of the gas inside the cylinder is more than the atmospheric pressure.
• When the gas cylinder kept in hot water, kinetic energy of gas molecules increases as the number of collisions increases.
• Therefore, the pressure increases and gas comes out of the cylinder.
• So, the given statement for assertion is true.

Explanation for Reason:

• The pressure exerted by a gas is proportional to the number of collisions of gas molecules with the walls of the container.
• This statement is true as with the increase in pressure, number of collisions of gas molecules also increases which states that these are directly proportional to each other.
• Thus, given reason is true.

Thus, we can say that option A is correct which states that Both A and R are true and R is the correct explanation of A.