CUSAT 2022 BTech Solved Paper Shift 3

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Question : 83 of 200

Marks: +1, -0

Which among the following methods is NOT a suitable one for the preparation of
benzene?

Passing ethyne under pressure through an iron tube heated up to 873 K
Soda lime distillation of benzoic acid
Treatment of chlorobenzene with sodium metal in dry ether
Passing phenol in the gaseous state over a heated bed of zinc dust

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