$(A)$ Compounds $P$ and $Q$ are carboxylic acids.
$(B)$ Compound $S$ decolorizes bromine water.
$(C)$ Compounds $P$ and $S$ react with hydroxylamine to give the corresponding oximes.
$(D)$ Compound $R$ reacts with dialkylcadmium to give the corresponding tertiary alcohol.
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$ \mathrm{N}_2=3.0 \times 10^{-3} \mathrm{M}, \mathrm{O}_2=4.2 \times 10^{-3} \mathrm{M} \text { and } \mathrm{NO}=2.8 \times 10^{-3} \mathrm{M} . $
$ 2 \mathrm{NO}_{(\mathrm{g})} \rightleftharpoons \mathrm{N}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})}$
If $0.1 \mathrm{~mol} \mathrm{~L} \mathrm{~L}^{-1}$ of $\mathrm{NO}_{(\mathrm{g})}$ is taken in a closed vessel, what will be degree of dissociation ( $\alpha$ ) of $\mathrm{NO}_{(\mathrm{g})}$ at equilibrium?
| Column $I$ | Column $II$ |
| $(A)$ $\mathrm{B}_2$ | $(p)$ Paramagnetic |
| $(B)$ $\mathrm{N}_2$ | $(q)$ Undergoes oxidation |
| $(C)$ $\mathrm{O}_2^{-}$ | $(r)$ Undergoes reduction |
| $(D)$ $\mathrm{O}_2$ | $(s)$ Bond order $\geq 2$ |
| $(t)$ Mixing of ' $\mathrm{s}$ ' and ' $\mathrm{p}$ ' orbitals |