JEE Advanced 2019 · Paper 2 · Chemistry Q8

ChemistryMultiple correct+4 / -1Question 26 of 54

Choose the correct option(s) from the following

Natural rubber is polyisoprene containing trans alkene units

Nylon-6 has amide linkages

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

Answer and worked solution

Official answer: B, C

(A) Natural rubber is cis-1,4-polyisoprene; gutta-percha is the trans form. False.
(B) Nylon-6, from caprolactam, is a polyamide. True.
(C) Teflon is made by heating tetrafluoroethene with a persulphate catalyst at high pressure. True.
(D) Cellulose is made of β-D-glucose units; starch is the one built from α units. False.

(B), (C)

Topics:Common polymers Carbohydrates

JEE Advanced 2019 · Paper 2, Chemistry question 8