When KMnO₄ acts as an oxidising agent and ultimately forms [MnO₄]^-2, MnO₂, Mn₂O₃, Mn⁺² then the number of electrons transferred in each case respectively is :

Which of the following ions has the maximum magnetic moment?

Most common oxidation states of Ce (cerium) are :

A square planar complex is formed by hybridisation of which atomic orbitals ?