Benzene is the polymer of

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(D) Benzene $(C_6H_6)$ is formed by the cyclic trimerization of ethyne $(C_2H_2)$.When ethyne gas is passed through a red-hot iron tube at $873 \ K$,i

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Ethyne

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(D) Benzene $(C_6H_6)$ is formed by the cyclic trimerization of ethyne $(C_2H_2)$.When ethyne gas is passed through a red-hot iron tube at $873 \ K$,it undergoes cyclic polymerization to form benzene.The reaction is: $3C_2H_2 \xrightarrow{873 \ K, 	ext{Red hot Fe tube}} C_6H_6$.Therefore,the correct option is $(d)$.

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