Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
The polymer(s) having 1, 3-butadiene as one of the monomer units, is (are) (1) nitrile rubber (2) ABS rubber (3) SBR (4) butyl rubberA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Except butyl rubber, which is in fact, a copolymer of isobutylene and isoprene, all other contain 1, 3-butadiene as a monomer unit.
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