Dehydration of an alcohol leads to the formation of an _____ .

alkene

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alkane

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alkyne

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alkyl halide

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Solution

The correct option is A alkene
Dehydration of an alcohol leads to the formation of an alkene. A molecule of water is lost and $C = C$ double bond is formed.

$C H_{3} - C H_{2} - O H Ethanol 95 % H_{2} S O_{4} - ------ \to 443 K H_{2} C = C H_{2} Ethylene + H_{2} O$

Hence the correct option is A.

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