JEE Main 2022 · 25 Jul · Shift 1 · Chemistry Q77 · Dronacharya Exams

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ChemistrySingle correct+4 / -1Question 77 of 90

Melamine polymer is formed by the condensation of :

A

2,4,6-Triamino-1,3,5-triazine + HCHO

1,3,5-Triazine ring with NH2 on each carbon (melamine), plus HCHO.

B

2,4,6-Triaminopyrimidine + HCHO

Pyrimidine ring with three NH2 groups, plus HCHO.

C

1,3,5-Triaminobenzene + HCHO

Benzene ring with NH2 at 1, 3 and 5, plus HCHO.

D

2,4-Diaminopyridine + HCHO

Pyridine ring with two NH2 groups, plus HCHO.

Answer and worked solution

Official answer: A

Melamine (2,4,6-triamino-1,3,5-triazine) condenses with formaldehyde.

(A)

Topics:Common polymers

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