JEE Main · 2022 · 25 Jul 2022 · Shift 1 · Polymers

Melamine polymer is formed by the condensation of:

(A)(see structure)
✓ Correct
(B)(see structure)
(C)(see structure)
(D)(see structure)

Answer: (A)

Solution

Melamine is 2,4,6-triamino-1,3,5-triazine, which has the molecular formula C₃H₆N₆. It contains a six-membered triazine ring with three amino groups attached at positions 2, 4, and 6. When melamine reacts with formaldehyde (HCHO), it undergoes condensation polymerization to form melamine-formaldehyde resin, a thermosetting polymer. Option (A) shows the correct structure of melamine with three NH₂ groups symmetrically arranged on the triazine ring.

JEE Main · 2022 · 25 Jul 2022 · Shift 1 · Single correct option

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