Shape-selective catalyst zeolite has a structure like ..........

Below,some catalysts and corresponding processes/reactions are matched. The mismatch is

Define the following terms:
$(i)$ Inhibitors
$(ii)$ Catalyst

The catalyst and promoter respectively used in the Haber's process of industrial synthesis of ammonia are

Identify the incorrect pair from the following:

In the oxidation of oxalic acid by $KMnO_4$,the color of $KMnO_4$ disappears slowly at the beginning of the reaction,but then it disappears very rapidly. This is an example of .......