Question

Give reason
In catalytic oxidation of ammonia the catalysts continues to glow even after heating is discontinued

Answer 1

Answer:

$\bold{experiment }$

▶Take a closed gas pipe tube two inlet and one outlet pipes

▶Take platinum chunks in that glass tube.

▶Now, pass ammonia from one inlet and oxygen from other with simultaneous heating.

$\bold {observation}$

▶The courless ,pungent smelling gas nitric oxide emits which on further oxidation gives a reddish brown gas which is nitrogen dioxide.

▶Platinum continues to glow even when heating is discontinued as the reaction done is an exothermic reaction.

▶Water droplets are seen at the inner surfaces of glass tube.

$\bold {equation}$

With platinum catalyst and temperature of 700-800 degrees.