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JEE Main levelSingle correct optionDifficulty 2 of 3ro173

1-Hexyne is added to Na in liquid and no alcohol or other proton source is added. The principal outcome is

  1. Ahexane
  2. Bformation of sodium hex-1-ynide with evolution of
  3. Chex-2-ene
  4. Dhex-1-ene

Answer: B

A terminal alkyne is acidic enough to be deprotonated by the amide or by sodium itself, giving the acetylide and hydrogen. The acetylide anion is already negatively charged and does not accept an electron, so the triple bond is not reduced.
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