Coloured salts are formed by

Spin only magnetic moment of $\left[ MnBr _{6}\right]^{4-}$ is $.....\,B.M.$ (round off to the closest integer)

Pair of ions which gives blue colour in aqueous state :

$V^{+4},\,Ni^{+2},\, Ti^{+3}, \,Co^{+2}, \,Fe^{+3}, \,Cu^{+2}$

In the series $Sc(Z = 21)$ to $Zn(Z = 30)$ , the enthalpy of atomization of _____ is the lowest

Transition elements show high melting points. Why?

The element exhibiting most stable $ + \,2$ oxidation state among the following is