Choose the correct option(s) from the following

Engineering

Chemistry

Carbohydrate

Homologous series

Polymers

Question

Choose the correct option(s) from the following

Teflon is prepared by heating tetrafluoroethene in presence of a persulphate catalyst at high pressure

Cellulose has only α - D-glucose units that are joined by glycosidic linkages

Natural rubber is polyisoprene containing trans alkene units

Nylon-6 has amide linkages

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Let's evaluate each option:

Option 1 is incorrect. Cellulose is a polymer of β-D-glucose units, not α-D-glucose, joined by β-1,4-glycosidic linkages.

Option 2 is correct. Teflon (PTFE) is synthesized via free-radical polymerization of tetrafluoroethene: $n CF 2 = CF 2 \overset{catalyst}{\to} [- CF 2 - CF 2] n$ .

Option 3 is correct. Nylon-6 is a polyamide, formed by ring-opening polymerization of caprolactam, containing the characteristic amide linkage $- NH - C (= O) -$ .

Option 4 is incorrect. Natural rubber (polyisoprene) contains cis alkene units, not trans.

Final Answer: The correct options are the second and third statements.