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Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes? [JEE Main 2025, 8 Apr (…

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

[JEE Main 2025, 8 Apr (Shift 1)]

a

\({\mathrm{H}}_{2}\mathrm{O}+{\mathrm{CH}}_{3}{\mathrm{COC}}_{2}{\mathrm{H}}_{5}\)

b

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

c

\({\mathrm{CS}}_{2}+{\mathrm{CH}}_{3}{\mathrm{COCH}}_{3}\)

d

\({\mathrm{CH}}_{3}\mathrm{OH}+{\mathrm{CHCl}}_{3}\)

✓ Correct answer: b)

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

Explanation

Binary mixture of C6H5OH and C6H5NH2 shows negative deviation from Raoult's law. So, vapour pressure of solution is less than V.P of pure C6H5OH and C6H5NH2. So, B.P. of solution is greater than boiling point of pure C6H5OH and C6H5NH2. So mixture shows maximum Boiling azeotrope

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