🩺 NEET🧪 Chemistry

Polymers

1 solved NEET Chemistry previous year questions on Polymers, each with the correct answer and a full explanation.

Among the following, the correct statement(s) about polymers is/are: [JEE Advanced 2022, Paper-2]

aThe polymerization of chloroprene gives natural rubber.

bTeflon is prepared from tetrafluoroethene by heating it with a persulphate catalyst at high pressures.

cPVC are thermoplastic polymers.

dEthene at 350-570 K temperature and 1000-2000 atm pressure in the presence of a peroxide initiator yields high-density polythene.

✓ Correct answer: b) Teflon is prepared from tetrafluoroethene by heating it with a persulphate catalyst at high pressures.

ExplanationThe correct statements about polymers are B and C. A. The polymerization of chloroprene gives natural rubber.This statement is incorrect.Natural rubber is a polymer of isoprene (2- methyl-1,3-butadiene).The polymerization of chloroprene (2- chloro-1,3-butadiene) yields neoprene, which is a synthetic rubber.B. Teflon is prepared from tetrafluoroethene by heating it with a persulphate catalyst at high pressures.This statement is correct.Teflon (polytetrafluoroethylene) is indeed manufactured by the polymerization of tetrafluoroethene (CF2C ) using a free radical initiator, such as a persulphate catalyst (e.g., ammonium persulphate), under high pressure.C. PVC are thermoplastic polymers.This statement is correct.Polyvinyl chloride (PVC) is a thermoplastic polymer, meaning it can be softened upon heating and hardened upon cooling repeatedly without significant chemical

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