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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
In vulcanisation the rubber becomes harder and stronger
b
Natural rubber has ‘trans’ configuration at every double bond.
c
Buna-S is a co-polymer of Butene and styrene
d
Natural rubber is 1, 4- polymer of isoprene.
answer is B.
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