1.

Natural rubber contains several thousand units of X linked together in the polymer chain. X is [NCERT 1980, 84; BHU 1983; CBSE PMT 1991; MP PMT 2001]

A.        Neoprene 
B.        Isoprene
C.        Chloroprene     
D.        Styrene
Answer» C.        Chloroprene     


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