Benzene and Alkyl Benzene - Result Question 5

5. The major product of the following reaction is

(2019 Main, 9 April I)

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Answer:

Correct Answer: 5. (a)

Solution:

In presence of alc. $KOH$, the given halide undergoes elimination reaction

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The alkene produced undergoes polymerisation via free radical mechanism. This process involve three steps, i.e. initiation, propagation and termination.