First slide

Non-ideal Solutions

Question

The mixture that forms maximum boiling azeotrope is

Moderate

A

heptane + octane
B

water + nitric acid
C

ethanol + water
D

acetone+carbon disulphide.

Solution

Maximum boiling azeotropes are formed by those solutions which show negative deviations from Raoult's law. $H_{2} O$ and $H N O_{3}$ mixture shows negative deviations.Mineral acids when dissolved in water get ionised. Strong ion - dipole attractions develop between mineral acid and water molecules.

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