A) \[\frac{\pi }{2}\]
B) \[C{{H}_{2}}=\overset{+}{\mathop{C}}\,H\]
C) \[CH\equiv \overset{+}{\mathop{C}}\,\]
D) \[\text{5a}+\text{2b}\]
Correct Answer: A
Solution :
Greater the delocalisation of positive charge by hyper conjugation of alkyl carbocation, higher is the stability. Hence, the order of stability of alkyl carbocations is\[\text{3}.\text{75}\times \text{1}{{0}^{\text{5}}}\] The. electronegativity of carbon increases with increases in s-character of hybrid orbitals which result decreases the stability of carbocation.
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