The high boiling point of ethanol (78.2^ C) compared to dimethyl … - Vidyadip

MCQ

The high boiling point of ethanol $(78.2^\circ C)$ compared to dimethyl ether $(−23.6^\circ C),$ though both having the same molecular formula $\ce{C_2H_6O},$ is due to:

✓
Hydrogen bonding
B
Ionic bonding
C
co-ordinate covalent bonding
D
Resonance

✓

Answer

Correct option: A.

Hydrogen bonding

The high boiling point of ethanol $(78.2^\circ C)$ compared to dimethyl ether $(−23.6^\circ C),$ though both having the same molecular formula $\ce{C_2H_6O},$ is due to Hydrogen bonding.
Hydrogen bonding is observed when $H$ atom is attached to more electronegative $N, F$ or $O$ atom.
Ethanol molecules are associated due to hydrogen bonding. This results in higher boiling point.
However, hydrogen bonding is not possible in dimethyl ether.

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