Question

Assertion :The magnitude of the work involved in an isothermal expansion is greater than
that involved in the adiabatic expansion.
Reason: P-V curve (P on the y-axis and V on the x-axis) decrease more rapidly for reversible adiabatic
expansion compared to reversible isothermal expansion starting from the same initial state.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

From the figure, it can be seen that, the magnitude of the work involved in an isothermal expansion is greater than that involved in an adiabatic expansion because of P-V curve (P on y-axis and V on the x-axis) decrease more rapidly for reversible adiabatic
expansion compared to reversible isothermal expansion starting from the same initial state.

Hence, the correct option is $\text{A}$