For a real gas described by the Van der Waals equation, the critical temperature (Tc) can be expressed in terms of the Van der Waals constants 'a' and 'b' and the gas constant 'R' as:
Correct: B
The critical constants (critical temperature Tc, critical pressure Pc, and critical volume Vc) are specific properties of a real gas at its critical point. These can be derived from the Van der Waals equation by setting the first and second derivatives of pressure with respect to volume to zero at the critical point. The derived expression for the critical temperature is Tc = 8a / 27Rb. This is a standard formula that NEET aspirants are expected to know for real gases.