The aqueous solutions of the following salts will be coloured in the case of:

The melting point of $Zn$ is lower as compared to those of the other elements of the $3d$ series because:

Transition elements form complex compounds primarily due to:

Among $Sc$,$Mn$,$Co$ and $Cu$,identify the element with the highest enthalpy of atomisation. The spin-only magnetic moment value of that element in its $+2$ oxidation state is $......... \text{BM}$ (in nearest integer).

Which of the following is paramagnetic?

In which pair of ions are both diamagnetic in nature?