Question

Arrange the following carbocations in decreasing order of stability, Question: A \( A > C > B \) B \( A>B>C \) C \( C>B>A \) D \( C>A>B \)

Answer 1

Carbocation (A) is stabilised by hyperconjugation due to 4α hydrogen atoms.

 Carbocation (C) is also stabilised by hyperconjugation but destabilised by −I effect of O-atom.

Carbocation (B) is most stable as it is stabilised by resonance.

So, Correct decreasing order of stability is  B > A > C.