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NEET levelSingle correct optionDifficulty 1 of 3ro020

Reduction of but-2-yne with sodium in liquid ammonia gives

  1. Acis-but-2-ene
  2. Bbutane
  3. Cbut-1-ene
  4. Dtrans-but-2-ene

Answer: D

Dissolving-metal reduction of an internal alkyne proceeds through a trans vinyl radical/anion and gives the trans (E) alkene.
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