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Heating ethanol with concentrated $H_2SO_4$ at $170^\circ$C on the lab burner gives:
ADiethyl ether, by intermolecular dehydration of two ethanols
BAcetic acid, by oxidation of ethanol under hot conditions
CEthene, by intramolecular dehydration of the alcohol
DEthyl hydrogen sulphate, the addition of ethanol to acid
Answer & Solution
Correct answer: C. Ethene, by intramolecular dehydration of the alcohol
At $\sim 170^\circ$C with conc. H$_2$SO$_4$, ethanol undergoes intramolecular dehydration to ethene.
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