The ability of transition metal ions to form complex compounds is due to:

The correct order of $E^o$ $M^{2+}/M$ values with negative sign for the four successive elements $Cr$,$Mn$,$Fe$ and $Co$ is

Which of the following ions is diamagnetic?

Which of the following represents the electronic configuration of a transition element?

Why do ions of the first transition series exhibit paramagnetism? State the calculated and experimental observed magnetic moments of these ions.

Among the following series of transition metal ions,the one in which all the metal ions have $3d^2$ electronic configuration (excluding the $3p^6$ core) is (Atomic number: $Ti=22, V=23, Cr=24, Mn=25$)