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(B) Styrene is primarily produced from ethylbenzene. Ethylbenzene is synthesized via the Friedel-Crafts alkylation of benzene with ethylene $(C_2H_4)$

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Ethene

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(B) Styrene is primarily produced from ethylbenzene. Ethylbenzene is synthesized via the Friedel-Crafts alkylation of benzene with ethylene $(C_2H_4)$ in the presence of an acid catalyst. Subsequently,styrene is obtained by the catalytic dehydrogenation of ethylbenzene: $C_6H_5CH_2CH_3 \rightarrow C_6H_5CH=CH_2 + H_2$. Thus,ethylene (ethene) is a key starting material for the synthesis of styrene.

The starting material for the preparation of styrene is

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