On large scale ethylene is prepared from:

acetaldehyde

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ethyl alcohol

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acetylene

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ether

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Solution

The correct option is B ethyl alcohol
$C H_{3} - C H_{2} - O H H_{2} S O_{4} - --- \to C H_{2} = C H_{2} + H_{2} O$

While ethyl alcohol is reacted in acidic medium, it leaves $- O H^{-}$ and $H^{+}$ to form wate.

It is called hydrogenation of ethyl alcohol.

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