Q. The most suitable reagent for the following conversion is : $H_3C-C\equiv C-CH_3 \rightarrow$ cis-2-butene
A) Na/liquid $NH_3$
B) $H_2$, Pd/C, quinoline
C) Zn/HCl
D) $Hg^{2+}/H^+$, $H_2O$
Explanation
[Solution] Lindlar's catalyst (Pd/C poisoned with quinoline) gives syn addition, producing the cis-alkene; Na/liq. $NH_3$ gives the trans-alkene. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.