Question

why we use Ni as a catalyst in reaction​

Answer 1

Explanation:

as nickel speeds up the reaction. but does not take part in it

Answer 2

Answer:

Estimates of the costs of Ni, Pd, Pt, Au and Rh catalyst precursors. Catalysis is a chemical phenomenon that increases the rate of a chemical reaction by spending only a tiny amount of additional substance, called a catalyst.....