Question

The brown gas evolved on heating of copper nitrate is​

Answer 1

the brown gas evolved is nitrogen dioxide -NO*2

Answer 2

Heating of copper nitrate produce nitrogen dioxide,copper oxide, oxygen.

Explanation:

This is a 2 step process.

If copper nitrate is taken as hydrated form, it will get dehydrated after heating.

Further heart will decompose it and the end product that will produce are- nitrogen dioxide which is a brown gas, copper oxide which is a black residue and oxygen.

The reaction is-

Cu(NO₃)₂=CuO+NO₂+O₂