Which of the following analogies is correct regarding dehydration of ethanol in presence of protic acid?
$443 K$ : Alkene:: $413 K$ :_________.

Alkyne

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Ether

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Aldehyde

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Carboxylic acid

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Solution

The correct option is B Ether
Alcohols undergo dehydration in the presence of protic acids, eg. $(H_{2} S O_{4}, H_{2} P O_{4})$ . The formation of the reaction product, alkene or ether depends on the reaction conditions. For example, ethanol is dehydrated to Ethane in the presence of sulfuric acid at $443 K$ . At $413 K$ , ethoxyethane is the main product.

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