Question

The catalyst used in the manufacture of nitric acid by Ostwald's process is:

Answer 1

In Ostwald’s process ammonia converted into nitric acid, in which platinum-metal is used as catalyst.

$3N{H}_3+O_2\underset{800\text{-}{1000}^{\circ }C}{\overset{Pt}{\to }}4NO+6H_{2}O$

$2NO+O_2\to 2N{O}_2$

$3N{O}_2+H_{2}O\to 2HN{O}_3+NO$