| \[\underset{(I)}{\mathop{{{H}_{2}}C=\overset{+}{\mathop{N}}\,=\overline{N}}}\,\] | \[\underset{(II)}{\mathop{{{H}_{2}}\overset{+}{\mathop{C}}\,-\overset{{}}{\mathop{N}}\,=\overline{N}}}\,\] |
| \[\underset{(III)}{\mathop{{{H}_{2}}\overset{-}{\mathop{C}}\,-\overset{+}{\mathop{N}}\,\equiv N}}\,\] | \[\underset{(IV)}{\mathop{{{H}_{2}}\overset{-}{\mathop{C}}\,-\overset{+}{\mathop{N}}\,=\overset{+}{\mathop{N}}\,}}\,\] |
A) (I) > (II) > (IV) > (III)
B) (I) > (III) > (II) > (IV)
C) (II) > (I) > (III) > (IV)
D) (III) > (I) > (IV) > (II)
Correct Answer: B
Solution :
[b] \[\underset{\begin{matrix} \text{ }\!\!~\!\!\text{ Octet}\,\text{complete} \\ \text{ }\!\!~\!\!\text{ 6}\,\text{covalent}\,\text{bond}\text{. }\!\!~\!\!\text{ } \\ \text{ }\!\!~\!\!\text{ }-ve\,\,\text{charge}\,\text{on}\,\text{N} \\ \end{matrix}}{\mathop{\underset{I}{\mathop{{{H}_{2}}C={{N}^{+}}={{N}^{-}}}}\,}}\,>\underset{\begin{matrix} \text{ }\!\!~\!\!\text{ Octet}\,\,\text{complete} \\ \text{ }\!\!~\!\!\text{ 6}\,\text{covalent}\,\text{bond, }\!\!~\!\!\text{ } \\ \text{ }\!\!~\!\!\text{ }-ve\,\text{charge}\,\text{on}\,\text{C} \\ \end{matrix}}{\mathop{\underset{III}{\mathop{{{H}_{2}}{{C}^{-}}-{{N}^{+}}\equiv N>}}\,}}\,\underset{\begin{matrix} \text{ }\!\!~\!\!\text{ Octet}\,\,\text{incomplete,} \\ \text{ }\!\!~\!\!\text{ 5}\,\text{covalent}\,\,\text{bond, }\!\!~\!\!\text{ } \\ \text{ }\!\!~\!\!\text{ }-ve\,\text{charge}\,\text{on}\,\text{N} \\ \end{matrix}}{\mathop{\underset{II}{\mathop{{{H}_{2}}{{C}^{+}}-N={{N}^{-}}}}\,}}\,>\underset{\begin{matrix} \text{ }\!\!~\!\!\text{ Octet}\,\,\text{incomplete,} \\ \text{ }\!\!~\!\!\text{ 5}\,\text{covalent}\,\,\text{bond, }\!\!~\!\!\text{ } \\ \text{ }\!\!~\!\!\text{ }-ve\,\text{charge}\,\text{on}\,\text{C} \\ \end{matrix}}{\mathop{\underset{IV}{\mathop{{{H}_{2}}{{C}^{-}}-N={{N}^{+}}}}\,}}\,\]
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