Two volatile liquids A and B form a maximum boiling azeotrope when mixed in a given ratio.
Which of the following statement is correct?

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

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A-B interactions are stronger than A-A and B-B interactions.

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Vapour pressure of the solution is more than that of pure components.

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Both (b) and (c)

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Solution

The correct option is B A-B interactions are stronger than A-A and B-B interactions.
A maximum boiling azeotrope is formed by non-ideal solutions showing negative deviation. Boiling point more than either of the two components so, vapour pressure is minimum at azeotropic concentration.

$P_{T} < p_{A}^{\circ} χ_{A} + p_{B}^{\circ} χ_{B}$

Mixtures showing negative deviation from Raoult's law have solute-solvent interactions stronger than that of solute-solute and solvent-solvent interactions.
So, A-B interactions are stronger than A-A and B-B interactions.

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