Identify incorrect statement
$Cu_2O$ is colourless
Copper $(I)$ compounds are colourless except when colour results from charge transfer
Copper $(I)$ compounds are diamagnetic.
$Cu_2S$ is black.
Horn silver is
If the colours of salts of transition elements are due to the presence of unpaired electrons in the transition metal ions, which of the following ions will be colourless in aqueous solution
The melting point of $Zn$ is lower as compared to those of the other elements of $3d$ series because
Which one of the following ions is colourless
$CuSO_4(aq) + 4NH_3 \rightarrow X,$ then $X$ is