Question

Observation when, Ammonia undergoes catalytic oxidation.

Answer 1

$\bold{Experiment}$

▶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.

$\bold{Equation}$

$4NH_3 + 5O_2 \longrightarrow 4NO + 6H_2O + 21.5K \: cal$

With platinum catalyst and temperature of 700-800 degrees.

Answer 2

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Here is your answer -

Observation

▶The colorless ,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.