MCQ
The high boiling point of ethanol (78.2°C) compared to dimethyl ether (−23.6°C), though both having the same molecular formula C2​H​6O, is due to:
  • A
    Hydrogen bonding
  • B
    Ionic bonding
  • C
    co-ordinate covalent bonding
  • D
    Resonance

Answer

  1. Hydrogen bonding

Explanation:

The high boiling point of ethanol (78.2°C) compared to dimethyl ether (−23.6°C), though both having the same molecular formula C2​H6​O, 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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