Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?
$\mathrm{CuCl}_{2}$
$\mathrm{AgCl}$
$\mathrm{ZnCl}_{2}$
$\mathrm{Cu}_{2} \mathrm{Cl}_{2}$
Highest $(+7) $ oxidation state is shown by
Which of the following is correct
The spin only magnetic moments (in $BM$) for free $\mathrm{Ti}^{3+}, \mathrm{V}^{2+}$ and $\mathrm{Sc}^{3+}$ ions respectively are (At.No. $Sc: 21; Ti : 22; V : 23)$
Mercury is the only metal which is liquid at ${0\,^o}C$. This is due to its
Misch metal an alloy of