MHT CET 2024 Chemistry question

Not in JEE Main or NEET syllabus

Which from following polymers contain -CO-NH- linkage in it ?

(A)Urea formaldehyde resinCorrect
(B)Glyptal
(C)Polycarbonate
(D)Thermocol

Answer: (A)

Solution

Urea-formaldehyde resin is formed by condensation of urea, , with formaldehyde through the groups; the repeating unit [-\mathrm{NH{-}CO{-}NH{-}CH_2-}]_n contains the (amide-type) linkage, so the

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Question ID VK-096687