(i) ∆mix H = zero

(ii) ∆mix V = zero

(iii) These will form a minimum boiling azeotrope.

(iv) These will not form the ideal solution.

Correct Answers:

(iii) These will form a minimum boiling azeotrope.

(iv) These will not form the ideal solution.

Explanation: The intermolecular forces between benzene and toluene molecules can be almost as strong as those of two benzene particles and two toluene molecules separately in a mixture of benzene and toluene. The solution would then be to create an appropriate solution and obey Raoult’s law.