$H - \mathop C\limits_{sp} \equiv \mathop C\limits_{sp} - H$
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$(i) $ in filling a group of orbitals of equal energy, it is energetically preferable to assign electrons to empty orbitals rather than pair them into a particular orbital.
$(ii)$ When two electrons are placed in two different orbitals, energy is lower if the spins are parallel.are valid for
$ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}\left(\mathrm{NO}_2\right)-\mathrm{COOH} $
$ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CHBr}-\mathrm{CH}_2-\mathrm{CH}_3 $
$ \mathrm{CH}_3-\mathrm{CH}(\mathrm{I})-\mathrm{CH}_2-\mathrm{NO}_2 $
$ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_2 \mathrm{OH} $
$ \mathrm{CH}_3-\mathrm{CH}-\mathrm{CH}(\mathrm{I})-\mathrm{C}_2 \mathrm{H}_5 $
| Column $I$ | Column $II$ | ||
| $(A)$ | ${\left( {C{H_3}} \right)_3}CH + 2{O_2}\xrightarrow[{\left[ O \right]}]{{KMn{O_4}}}$ | $(i)$ | $CH_3COOH+H_2O$ |
| $(B)$ | $2C{H_4} + {O_2}\xrightarrow[{100\,atm}]{{Cu/523\,\,K}}$ | $(ii)$ | $(CH_3)_3COH$ |
| $(C)$ | $C{H_4} + {O_2}\xrightarrow[\Delta ]{{M{o_2}{O_3}}}$ | $(iii)$ | $2CH_3OH$ |
| $(D)$ | $C{H_3} - C{H_3} + \frac{3}{2}{O_2}\xrightarrow{{{{\left( {C{H_3}COO} \right)}_2}Mn}}$ | $(iv)$ | $HCHO + H_2O$ |
(image) $\xrightarrow[{Pd - BaS{O_4}}]{{{H_2}}}\,A$
The product $A$ is
$C{O_2}(s) \rightleftharpoons C{O_2}(g)$