MolSynapsequestion bank

MolSynapse / Question bank / Polymers / Rubber and vulcanisation

JEE Main levelSingle correct optionDifficulty 2 of 3pl192

The mass percentage of chlorine in neoprene (repeat unit $- [CH X_{2} - C (Cl) = CH - CH X_{2}] X^{-}$ , C 12, H 1, Cl 35.5) is closest to

A35.5
B40.1
C56.8
D47.0

Answer: B

The repeat unit is

C X_{4} H X_{5} Cl

with mass 48 + 5 + 35.5 = 88.5. Chlorine percentage = 35.5/88.5 x 100 = 40.1. The value 56.8 belongs to PVC.

Practice Polymers More on Rubber and vulcanisation

Previous questionNext question

More questions on Rubber and vulcanisation

Buna-S is a copolymer of NEET level
Ozonolysis of natural rubber followed by reductive work-up (Zn/H2O) cleaves every C=C of the 1,4-polyisoprene chain. The main product is JEE Advanced level
Natural rubber is vulcanised by heating it with NEET level
The monomer unit of natural rubber is NEET level
Which of the following statements about natural rubber and gutta-percha is/are correct? (One or more options may be correct.) JEE Advanced level
Complete catalytic hydrogenation of natural rubber saturates every C=C. The molar mass of the saturated repeat unit (C 12, H 1) is JEE Main level