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The trans -alkenes are formed by the reduction of alkynes with :

1. H 2 – Pd/C, BaSO 4
2. NaBH 4
3. Na/liq. NH 3
4. Sn – HCl Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Hydrocarbon, Q. No. 21 & 28 (solved) Ex # 4 ]

Correct answer: Na/liq. NH 3

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