The correct order of increasing stabilities o | vedclass

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Question

(A) The stability of carbocations is determined by factors such as resonance,hyperconjugation,and the inductive effect.$1$. Benzyl carbocation $(iii)$

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$iv < ii < i < iii$

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(A) The stability of carbocations is determined by factors such as resonance,hyperconjugation,and the inductive effect.$1$. Benzyl carbocation $(iii)$ is the most stable due to extensive delocalization of the positive charge through resonance with the benzene ring.$2$. Allyl carbocation $(i)$ is stable due to delocalization of the positive charge through resonance with the adjacent $\pi$-bond.$3$. Ethyl carbocation $(ii)$ is a primary $(1^{\circ})$ carbocation,which is stabilized by hyperconjugation from three $\alpha$-hydrogens.$4$. Isobutyl carbocation $(iv)$ is also a primary $(1^{\circ})$ carbocation. Although it has a branched alkyl group,the positive charge is on the primary carbon,and it is less stable than the ethyl carbocation due to steric hindrance and electronic factors compared to the simpler ethyl system.Comparing the stability: Benzyl $(iii)$ > Allyl $(i)$ > Ethyl $(ii)$ > Isobutyl $(iv)$.Therefore,the increasing order of stability is $iv < ii < i < iii$.

The correct order of increasing stabilities of the following carbocations is:
$(i)$ Allyl carbocation
$(ii)$ Ethyl carbocation
$(iii)$ Benzyl carbocation
$(iv)$ Isobutyl carbocation

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The correct order of increasing stabilities of the following carbocations is:$(i)$ Allyl carbocation$(ii)$ Ethyl carbocation$(iii)$ Benzyl carbocation$(iv)$ Isobutyl carbocation