Buna-S rubber is which of the following of 1-3-butadiene and styrene

Q. Assertion: Polybutadiene is an example of chain growth polymer

Reason: Copolymerization of butadiene and styrene gives Buna - S

Q.

Match the polymers given in Column I with their commercial names given in Column II.

$\begin{array}{cccc}& ColumnI& & ColumnII\\ A.& Polyesterofglycolandphthalicacid& 1.& Novolac\\ B.& Copolymerof1,3-butadieneandstyrene& 2.& Glyptal\\ C.& Phenolandformaldehyderesin& 3.& Buna-S\\ D.& Polyesterofglycolandterephthalicacid& 4.& Buna-N\\ E.& Copolymerof1,3-butadieneandacrylonitrile& 5.& Dacron\end{array}$

Q. 'Buna-N rubber' is a coploymer of butadiene and acrylonitrile. In comparison to natural rubber it:

Q.

Match the polymers given in Column I with their commercial names given in Column II

	Column I		Column II
(i)	Polyester of glycol and phthalic acid	(a)	Novolac
(ii)	Copolymer of 1,3-butadiene and styrene	(b)	Glyptal
(iii)	Phenol and formaldehyde resin	(c)	Buna-S
(iv)	Polyester of glycol and terephthalic acid	(d)	Buna-N
(v)	Copolymer of 1,3-butadiene and acrylonitrile	(e)	Dacron

Q. Acrylonitrile, butadiene and styrene are a kind of: