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As per your syllabus, reduction of an alkyne to a TRANS alkene uses which reagent system?
AAqueous H₂SO₄
BLindlar's catalyst
CSodium in liquid ammonia
DH₂ / Pt at high pressure
Answer & Solution
Correct answer: C. Sodium in liquid ammonia
Your syllabus: Na/liq NH₃ gives trans alkene (via single-electron addition + vinyl radical inversion). Lindlar gives cis.
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