Which of the following ionic species will impart colour to an aqueous solution
$T{i^{4 + }}$
$C{u^ + }$
$Z{n^{2 + }}$
$C{r^{3 + }}$
Which of the following order is correct
Cuprous ion is colourless, while cupric ion is coloured because
$\operatorname{Zr}\,(\mathrm{Z}=40)$ and $\mathrm{Hf}\,(\mathrm{Z}=72)$ have similar atomic and ionic radii because of :
Which of the following match is INCORRECT :
If $CdI_2$ is pink in colour, the $CdCl_2$ will be ........... coloured.