Question

The most suitable reagent for the following conversion, is :
(1) Na/ liquid NH₃
(2) H₂ , Pd/C, quinoline
(3) Zn/HCl
(4) Hg²⁺ /H⁺, H₂O

Answer 1

Correct option -2

Step step explanation:

• In the presence of hydrogen and Lindlar's catalyt(Pd/C.quinoline) alkyne undergoes syn addition to form cis -alkene.
• This catalyst is particularly used for the hydrogenation of alkynes.
• And this catalyst stops the reaction automatically when one mole of hydrogen is added to the compound.
• In the presence of sodium/liquid ammonia alkyne converted into trans an alkene.

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