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If the boiling point of ethanol (molecular weight = 46) is 78°C, the boiling point of diethyl ether (molecular weight = 74) is

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100°C

78°C

86°C

34°C

answer is B.

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Detailed Solution

The boiling point of ethanol is 78 °C, and because ethanol contains intermolecular hydrogen bonds, its B.P. is higher than that of diethyl ether.

Boiling point ether < ethanol.
Hence the correct option (B). $78^{°} C$

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