Q. Buna –N- synthetic rubber is a copolymer of
A) $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Cl\ \$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\$
$H_{2}C = CH - C = CH_{2}\ and\$
$H_{2}C = CH - CH = CH_{2}$
B) $H_{2}C = CH - CH = CH_{2}\ and\ H_{5}C_{6} - CH = CH_{2}$
C) $H_{2}C = CH - CN\ and\ H_{2}C = CH - CH = CH_{2}$
D) $H_{2}C = CH - CN\ and\ H_{2}C - C = CH_{2}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\$
${\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH}_{3}$
Explanation
(c)
Buna-N actually abbreviated from where Bu represents 1,3-butadiene,Na represents Na, sodium and N represents nitrile (acrylonitrile).Thus buna-N is copolymer of 1,3-butadiene and acrylonitrile usually polymeries in the presence of sodium.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.