JEE Main Chemistry question
Not in JEE Main or NEET syllabus
How many of the following are INCORRECT?
i. HDP - linear polymer ii. Novolac - linear polymer iii. Nylon-6 - polyamide iv. Dacron - step growth polymerization v. Teflon - chain growth polymerization vi. Buna-S - copolymer vii. Polyacrylonitrile - copolymer viii. Neoprene - copolymer
Answer: 2
Solution
HDPE is indeed a linear polymer (i, correct), Novolac (the linear phenol-formaldehyde prepolymer before curing) is indeed linear (ii, correct), nylon-6 is indeed a polyamide (iii, correct), Dacron is indeed formed by step-growth/condensation polymerisation (iv, correct), Teflon is indeed formed by
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