Among $Co ^{3+}, Ti ^{2+}, V ^{2+}$ and $Cr ^{2+}$ ions, one if used as a reagent cannot liberate $H _{2}$ from dilute mineral acid solution, its spin-only magnetic moment in gaseous state is $......B.M$. (Nearest integer)
$6$
$5$
$3$
$4$
$F{e^{2 + }}$ shows
Which of the following metals make the most efficient catalyst
In which pair of ions both are diamagnetic in nature?
The ability to form complex compounds by the transitional metal ion is due to
Which one of the following compounds is not coloured