Which of the following binary mixture does not show the behaviour… - Vidyadip

MCQ

Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?

A
$\mathrm{H}_{2} \mathrm{O}+\mathrm{CH}_{3} \mathrm{COC}_{2} \mathrm{H}_{5}$
✓
$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}+\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
C
$\mathrm{CS}_{2}+\mathrm{CH}_{3} \mathrm{COCH}_{3}$
D
$\mathrm{CH}_{3} \mathrm{OH}+\mathrm{CHCl}_{3}$

✓

Answer

Correct option: B.

$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}+\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$

(B) $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}+\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
Binary mixture of $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH}$ and $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$ shows negative deviation from Raoult's law
So vapour pressure of solution is less than V.P of pure $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH} \& \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
So B.P. of solution is greater than boiling point of pure $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{OH} \& \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$
So shows maximum Boiling azeotrope

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