Chemistry - Hydrocarbon Question with Solution | TestHub

Explanation Question:

To find out the stereochemistry of the products

Concept:

This question is based on:

(1) Partial reduction of alkane by ${\mathrm{H}}_2/\mathrm{Pd}/{\mathrm{CO}}_3$ Lindlar's catalyst

(2) Brich reduction $\mathrm{Na}/{\mathrm{NH}}_3(\ell )$

Solution:

Above reduction is Birch reduction and leads to formation of trans alkane.

Cis

Above reaction is partial reduction of alkyne by lindlar's catalyst leads to formation of cis-alkene. Final Answer: Option (A)