Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): For an ideal solution formed by mixing two volatile liquids, _ mix H = 0 and _ mix V = 0 . Reason (R): The entropy of mixing ( _ mix S ) for an ideal solution is zero because there is no change in the magnitude of intermolecular forces. In the light of the above statements, choose the most appropri

Step-by-step solution

Assertion (A) is correct: By definition, when two liquids mix to form an ideal solution, there is no change in enthalpy ( _ mix H = 0 ) and no change in volume ( _ mix V = 0 ). Reason (R) is incorrect: The entropy of mixing ( _ mix S ) is always positive ( _ mix S > 0 ) for the formation of any solution (ideal or non-ideal). This is because the mixing of two distinct substances increases the randomness or disorder of the system. The absence of change in intermolecular forces does not mean the entropy change is zero