Question

On heating blue coloured powder of copper nitrate in a boiling tube copper oxide (black) oxygen gas and a brown gas X is formed . Identify the brown gas X

Answer 1

Here is ur answer.....

The brown gas obtained is nitrogen dioxide...

NO2

Hope it helps u

Answer 2

2 cu(No3)2(s) -------> 2cuO(s) + 4NO2(g)

X is nitrogen dioxide gas