Although $Zr$ belongs to $4d$ and $Hf$ belongs to $5d$ transition series but it is quite difficult to separate them. Why ?
Which of the following pairs of elements cannot form an alloy
$Cu^+$ ion is not stable in aqueous solution, due to
When ammonia is added to a cupric salt solution, the deep blue colour is observed it is due to the formation of
The $3d$ metal ions form coloured compounds because the energy corresponding to the following lies in the visible range of electromagnetic spectrum
Effective magnetic moment of $S{c^{ + 3}}$ ion is