MHT CET 2025 Chemistry question

Not in JEE Main or NEET syllabus

Which from following polymers contains -CO-NH-linkage?

(A)Glyptal
(B)Thermocol
(C)Buna-N
(D)Urea-formaldehyde resinCorrect

Answer: (D)

Solution

Check the linkage in each polymer. Glyptal (glycerol + phthalic acid) is a polyester with ester linkages. Thermocol (expanded polystyrene) is an addition polymer with only C-C backbone. Buna-N (butadiene-acrylonitrile copolymer) has a hydrocarbon backbone with

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Question ID VK-102101