Question

The metal used as a catalyst in the hydrogenation of oils is:

• A. sodium
• B. nickel
• C. mercury
• D. manganese

Answer 1

Answer: (B)

nickel

$Ni$ as catalyst binds both the $H_2$ and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so.

$Ni$ is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost-effectiveness is best and desired pathway.