JEE Main Chemistry question
Not in JEE Main or NEET syllabus
How many of the following are condensation polymers?
Butyl rubber, PMMA, PET, Glyptal, PAN
Answer: 2
Solution
Checking each: Butyl rubber (copolymer of isobutylene and isoprene, formed by addition/cationic polymerisation) — not condensation. PMMA (polymethyl methacrylate, formed by addition polymerisation of methyl methacrylate) — not condensation. PET (polyethylene terephthalate/Terylene, formed by condensation of
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