Which of the following the laboratory preparation of ethene?

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Heating ethyl alcohol with excess of concentrated sulphuric acid at 180° C

Heating ethyne with excess of concentrated calcium carbide at 180° C

Heating ethyne with excess of concentrated sodium chloride at 180° C

Heating ethyne with excess of concentrated phosphoric acid at 180° C

answer is C.

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Detailed Solution

In the laboratory, ethene can be prepared by heating ethyl alcohol with excess of concentrated sulphuric acid at 180° C.

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