Which one of the following characteristics of the transition metals is associated with their catalytic activity
Variable oxidation states
High enthalpy of atomization
Paramagnetic behaviour
Colour of hydrated ions
In nitroprusside ion, the iron exists as $Fe^{2+}$ and $NO$ as $NO^+$ rather than $Fe^{3+}$ and $NO$ respectively. These forms of ions are established with the help of
The ability to form complex compounds by the transitional metal ion is due to
Why do the transition elements exhibits variable oxidation states?
The colour of copper sulphide is
Which of the following order of atomic radius is not wrong