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NEET levelSingle correct optionDifficulty 1 of 3ro002

Hydrogenation of with over Lindlar catalyst gives mainly

  1. Acis-but-2-ene
  2. Btrans-but-2-ene
  3. Cbutane
  4. Dbut-1-ene

Answer: A

Lindlar catalyst (Pd on , poisoned with quinoline) stops at the alkene stage and delivers both hydrogens to the same face (syn addition), so the cis alkene is formed.
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