Q.

The correct statement about the mixture of phenol and aniline are

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a

A-A and B-B interactions are weaker than A-B interactions

b

it forms a maximum boiling azeotrope

c

ΔHmix<0

d

All the above

answer is C.

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Detailed Solution

In the mixture of phenol and aniline, the intermolecular hydrogen bonding between phenolic proton and lone pair on N-atom of aniline is stronger than the respective intermolecular hydrogen bonding between two same  molecules. Thus, their mixture shows negative deviation from Raoult's law.For such mixtures,ΔHmix <0 and ΔVmix <0It forms a maximum boiling azeotrope.
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