Question

Why is a iron catalyst used in the Haber process?

Answer 1

Iron catalyst is used in the Haber process for synthesis of ammonia because iron is not easily poisoned as compared to other catalysts.

Catalysts main role in the industrial processes in to increase the yield of the products.

When catalyst used is poisoned its efficiency is reduced in that the yield of that given product is reduced.

Answer 2

A Catalyst is a substance which alters the rate of Chemical reaction without itself participating in the reaction
In Haber's Process low temperature and high pressure is favoured , the catalyst Iron increase the rate of reaction while itself not get poisoned easily. as compared to other metal catalyst.
if a catalyst is poisoned the yeild of the product so formed is reduced.