JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The correct repeating structural unit of polystyrene is

(A)-CH_2-CH(C_6H_5)-CH(C_6H_5)-CH_2-
(B)-CH_2-CH(C_6H_5)-CH_2-CH(C_6H_5)-Correct
(C)-CH(C_6H_5)-CH_2-CH_2-CH(C_6H_5)-
(D)-CH_2-CH(C_6H_5)-CH_2-CH=CH-CH_2-

Answer: (B)

Solution

Polystyrene is formed by head-to-tail addition polymerization of styrene, , giving a regular repeat unit in which every alternate backbone carbon bears a phenyl group, i.e., , matching option (b). Option (a) wrongly places two phenyl groups on adjacent

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Question ID VK-151386