$(B) Li^+ > Mg^{2+}$
$(C)$ Strength of hydrogen bonding
$(D)$ Boiling points increases with Molecular mass
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| Column $I$ | Column $II$ |
| $(A)$ $\mathrm{Cu}+$ dil $\mathrm{HNO}_3$ | $(p)$ NO |
| $(B)$ $\mathrm{Cu}+$ conc $\mathrm{HNO}_3$ | $(q)$ $\mathrm{NO}_2$ |
| $(C)$ $\mathrm{Zn}+$ dil $\mathrm{HNO}_3$ | $(r)$ $\mathrm{N}_2 \mathrm{O}$ |
| $(D)$ $\mathrm{Zn}+$ conc $\mathrm{HNO}_3$ | $(s)$ $\mathrm{Cu}\left(\mathrm{NO}_3\right)_2$ |
| $(t)$ $ \mathrm{Zn}\left(\mathrm{NO}_3\right)_2$ |
$\begin{array}{*{20}{c}}
{{H_3}COOC - CH - COOC{H_3}} \\
{|\,\,} \\
{\,\,\,\,\,\,C{H_2}OH}
\end{array}$