Identify the element for which the electronic configuration in the $+3$ oxidation state is $[Ar] 3d^5$:

Which of the following is a diamagnetic transition metal ion?

The $E^{\circ}$ value for the $Mn^{3+} / Mn^{2+}$ couple is more positive than that of $Cr^{3+} / Cr^{2+}$ or $Fe^{3+} / Fe^{2+}$ due to change of

The statement that is $INCORRECT$ about the interstitial compounds is

In the $3d$ series of $d-$block elements,which of the following elements has the maximum atomic size?

Variable valency,in general,is exhibited by