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NEET levelSingle correct optionDifficulty 1 of 3cb176

Ethanol (b.p. $7 8^{\circ} C$ ) boils much higher than dimethyl ether (b.p. $- 2 4^{\circ} C$ ) although both are $C X_{2} H X_{6} O$ . This is due to

Aionic character of the C-O bond in ethanol
Bintermolecular hydrogen bonding in ethanol
Cstronger London forces in dimethyl ether
Da higher molar mass of ethanol

Answer: B

The two are isomers with the same molar mass, so dispersion forces are comparable. Ethanol has an O-H group and forms intermolecular hydrogen bonds, while dimethyl ether has no O-H and cannot. This raises the boiling point of ethanol.

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