On adding excess of `NH_4OH` to copper sulphate solution

When excess of KI is added to copper sulphate solution

State any one observation for each of the Ammonium hydroxide solution is added in excess to copper sulphate solution.

What happens when ammonium hydroxide is added dropwise in excess to : copper sulphate solution ?

Lead is added to copper sulphate solution.

When excess of ammonia is added to copper sulphate solution, a deep blue solution is formed. This is due to formation of _____.

When excess of ammonia is added to copper sulphate solution, the deep blue coloured complex id formed. The complex is ___________.