Heating ammonia gas with tetraoxosulphate (VI) acid
Heating ammonium trioxonitrate (V) with tetraoxosulphate (VI) acid
Heating sodium trioxonitrate (V) with tetraoxosulphate (VI) acid
Heating potassium trioxonitrate (V) with calcium hydroxide
Heating a mixture of ammonia gas and oxygen.
Correct answer is C
No explanation has been provided for this answer.