Question

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

• A. Sn-HCl
• B. $H_2-Pd/C,BaS{O}_4$
• C. $NaB{H}_4$
• D. $Na/liq.N{H}_3$

Answer 1

Answer: (D)

$Na/liq.N{H}_3$ reduces alkynes into trans alkene (trans addition) as its mode is anti addition while rest other are syn addition reagents.