Discussion
The major product obtained in the dehydration of ethanol in the presence of \(H_{2}SO_{4}\) at 413 K is
Answer: D
The major product is ethoxyethane.
With concentrated sulphuric acid at 413 K, ethanol is in excess and dehydrates intermolecularly: one protonated ethanol molecule is attacked by another, giving diethyl ether:
\[ 2C_{2}H_{5}OH \to C_{2}H_{5}OC_{2}H_{5} + H_{2}O \]
At a higher temperature (about 443 K) intramolecular dehydration gives ethene instead. Ethanal and ethanoic acid are oxidation products, and ethane and ethyne are not formed by dehydration.
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