Question

When ammonia is heated at 800°c impact crystal the gas envolved is
1.nitrogen
2.steam
3.hydrogen
4.nitric oxide

Answer 1

Answer:

nitrogen......

.....

Answer 2

It initially melts at temperatures over 235 °C (unlike other ammonium salts, which sublimate), but then decomposes, initially into the hydrogen sulphate and ammonia:

(NH4)2SO4 → (NH4)HSO4 + NH3

further heating will then see the above break down into nitrogen, sulphur dioxide & water vapour.