Question

A substance which increases the efficiency of a catalyst is called

Answer 1

A catalyst promoter increases the efficiency of a catalyst while a poison decreases the efficiency of the catalyst. Substances which themselves are not catalysts but when mixed in small quantities with the catalysts increase their efficiency are called as promoters or activators.

Answer 2

Answer:

A catalyst promoter increases the efficiency of a catalyst while a poison decreases the efficiency of the catalyst. Substances which themselves are not catalysts but when mixed in small quantities with the catalysts increase their efficiency are called as promoters or activators.

Explanation:

Though nitrogen is used as a promoter, we can see that platinum reduces its activity and hence decreases the rate of reaction of equilibrium in the above reaction.