Question

Dry ammonia gas is passed over black substance as shown in figure below :

(i) Name the black substance A.

(ii) Name the gas evolved B.

(iii) Write a balanced equation for the reaction of ammonia with A.

(iv) What do you observe when ammonia is passed over copper oxide ?

(v) State the property illustrated in the above reaction (iii). 

Answer 1

(i) Copper II oxide.

(ii) Nitrogen gas.

(iv) The black mass changes to reddish powdery mass.

(v) Ammonia is a reducing agent.