Which one of the following ions is the most stable in aqueous solution?
(At. No. $Ti = 22, V = 23, Cr = 24, Mn = 25$)
$V^{3+}$
$Ti^{3+}$
$Mn^{3+}$
$Cr^{3+}$
In which pair of ions both are diamagnetic in nature?
In which of the following pairs are both the ions coloured in aqueous solution ?
(At. no. : $Sc = 21, Ti = 22, Ni = 28,$$ Cu = 29, Co = 27$)
Which of the following metal is present in Brass, Bronze and German silver ?
$\operatorname{Zr}\,(\mathrm{Z}=40)$ and $\mathrm{Hf}\,(\mathrm{Z}=72)$ have similar atomic and ionic radii because of :
The term platforming is