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Which of the following catalyst is used at $170 ℃$ in the following reaction?

$C_{2} H_{5} OH \to C H_{2} = C H_{2}$

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Alkaline

KMn O_{4}

conc.

H_{2} S O_{4}

dry

HCl

NaHC O_{3}

answer is B.

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Detailed Solution

The catalyst used in the given reaction is conc.

H_{2} S O_{4}

.
The conversion of ethanol to ethene is an example of a dehydration reaction. The loss of water in a chemical reaction is called dehydration. Ethanol undergoes dehydration in the presence of conc.

H_{2} S O_{4}

to form ethene. Its reaction is given as

C_{2} H_{5} OH + conc . H_{2} S O_{4} \to C H_{2} = C H_{2} + H_{2} O

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