Which one of the following ions is the most stable in aqueous solution?
(At. No. $Ti = 22, V = 23, Cr = 24, Mn = 25$)
$V^{3+}$
$Ti^{3+}$
$Mn^{3+}$
$Cr^{3+}$
Amongest following the lowest degree of paramagnetism per mole of the compound at $298 K$ will be shown by
$\operatorname{Zr}\,(\mathrm{Z}=40)$ and $\mathrm{Hf}\,(\mathrm{Z}=72)$ have similar atomic and ionic radii because of :
Amongst $Ti{F_6}^{2 - }\,,\,Co{F_6}^{3 - }\,,\,C{u_2}C{l_2}$ and $NiCl_4^{2-}$ the colourless species are
Out of $Cu_2Cl_2$ and $CuCl_2$, which is more stable and why ?
Which of the following pairs involves isoelectronic ions