A student has been given a compound " x " of molecular formula \(-\mathrm{C}_{6} \mathrm{H}_{7} \mathrm{~N}\). ' x ' is sparingly soluble in water. However, on addition of dilute mineral acid , ' x ' becomes soluble in water. ' x ' when treated with \(\mathrm{CHCl}_{3}\) and KOH (alc.) ' y ' is produced. ' y ' has a specific unpleasant smell. On treatment with benzenesulphonyl chloride, ' x ' gives a compound ' z ' which is soluble in alkali. The number of different "H" atoms present in ' \(z\) ' is:-

JEE Main · 2026 · 23 Jan 2026 · Shift 2 · Compounds Containing Nitrogen

A student has been given a compound " x " of molecular formula

- C_{6} H_{7} N

. ' x ' is sparingly soluble in water. However, on addition of dilute mineral acid , ' x ' becomes soluble in water. ' x ' when treated with

CHCl_{3}

and KOH (alc.) ' y ' is produced. ' y ' has a specific unpleasant smell. On treatment with benzenesulphonyl chloride, ' x ' gives a compound ' z ' which is soluble in alkali. The number of different "H" atoms present in '

z

' is:-

(A)5
(B)8
(C)4
(D)7✓ Correct

Answer: (D)

Solution

The formula

C_{6} H_{7} N

for a base that is sparingly soluble in water, dissolves in dilute acid, and gives the foul-smelling isocyanide of the carbylamine test identifies a primary aromatic amine, aniline. With benzenesulphonyl chloride (Hinsberg reagent) a primary amine yields N-phenylbenzenesulphonamide,

C_{6} H_{5} S O_{2} NH C_{6} H_{5}

, whose N--H is acidic enough to dissolve in alkali. Its distinct hydrogens are the N--H proton together with the ortho, meta and para hydrogens of each monosubstituted ring, giving

1 + 3 + 3 = 7

different hydrogen environments.

JEE Main · 2026 · 23 Jan 2026 · Shift 2 · Single correct option

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JEE Main · 2026 · 23 Jan 2026 · Shift 2 · Compounds Containing Nitrogen

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