JEE Main 2026 — Jan 28, Shift 1 — Chemistry solution

JEE Main2026Jan 28, Shift 1Chemistry

Consider the following reactions giving major product. Identify the correct reaction.

A
Reaction (1)
B
Reaction (2)
C
Reaction (3)
D
Reaction (4)

Solution

Reaction (1): In benzanilide (PhNHCOPh), nitration directs to the more activated ring (the aniline-derived ring); the product drawn places NO $_{2}$ on the wrong ring, so the major product shown is incorrect.

Reaction (2): Gabriel phthalimide synthesis fails with aryl halides because the SN $^{2}$ step does not work on sp $^{2}$ aryl carbons; no reaction.

Reaction (3): Carbylamine of PhCH $_{2}$ NH $_{2}$ gives Ph-CH $_{2}$ -NC. Reduction with Sn/HCl gives a secondary amine PhCH $_{2}$ NHCH $_{3}$ — but the standard reduction of isocyanide to the amine is normally with H $_{2}$ /Pt, not Sn/HCl, and Sn/HCl conditions do not cleanly give the depicted product as the major product. Your institute treats this as incorrect.

Reaction (4): Propanamide undergoing Br $_{2}$ + 4 KOH (alc.) gives Hofmann bromamide degradation, producing the amine with one fewer carbon (ethylamine), together with KBr, K $_{2}$ CO $_{3}$ and H $_{2}$ O. This is the textbook outcome and is the correct major product.

$∴$ Option (4).

← Back to full paper

Practice more Chemistry

Concept-wise practice with instant solutions on Fundamenthol.

Start practicing →