Question

Synthetic rubbers are usually obtained by copolymerisation of:

• A. styrene and $1,3$ - butadiene
• B. $1,4$ - polyisoprene
• C. urea and formaldehyde
• D. alkane and $1,3$ - butadiene

Answer 1

The correct option is A styrene and $1,3$ - butadiene

Synthetic rubbers are formed from petroleum-based monomers. Example - Styrene-butadiene rubber (Buna - S). It is obtained by copolymerisation of styrene and 1,3 - butadiene from a mixture of 3:1 in the ratio.