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In the proton spectrum of ethanol the methyl signal appears as a triplet because it has

  • A.one neighbouring proton only
  • B.no neighbouring protons at all
  • C.two equivalent neighbouring protons
  • D.three equivalent neighbouring protons

Answer: C

The two methylene protons split it into three lines of intensity 1:2:1, and the methylene signal is in turn split into a quartet by the three methyl protons. The hydroxyl proton often appears as a singlet because it exchanges rapidly.

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