Assertion : For a certain fixed amount of gas, the product PV is always constant.
Reason : Real gases have higher pressure and lower volume than ideal gases and hence product PV is constant.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

D

Explanation

Product PV is constant only for ideal gases at constant temperature. Real gases have lower pressure than ideal gas pressure and obey van der Waals equation.