Q. Natural rubber is polymer of
A) $\ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\ \$
$H_{2}C = C - CH = CH_{2}$
B) $\ \ \ \ \ \ \ \ \ \ \ \ \ \ Cl\ \$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\ \$
$H_{2}C = C - CH = CH_{2}$
C) $C_{6}H_{5}$
$\ |\ \$
$CH = CH_{2}$
D) [image:15_image5.emf]
Explanation
(a)
$CH_{3}$
$\ \ \ \ \ \ \ \ |\ \$
(a) $H_{2}C = C - CH = CH_{2}$is isoprene of 2-methyl 1, 3-butadiene. It is a monomer of natural rubber.
$CH_{3}$
$\ \ \ \ \ \ \ \ |\ \$
(b) $H_{2}C = C - CH = CH_{2}$ is chloroprene or 2-chloro 1, 3-butadiene. It is a monomer of neoprene.
(c) $C_{6}H_{5}CH = CH_{2}$is styrene. It is copolymer of buna-S rubber.
(d)
[image:15_image31.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.