AP EAMCET Engineering 18 Sep 2020 Shift 2 Paper

Stability of carbocation ∝ number of hyperconjugative structure ∝ number of α−H atoms
(1)

α

C

H3−

⊕

C

H−

α

C

H3, Hyperconjugative structure =6
(2)

⊕

C

H3, Hyperconjugative structure =0
(3)

α

C

H3−

⊕

C

| ‌‌‌‌CH3

−

α

C

H3, Hyperconjugative structure =9
(4)

α

C

H3−

⊕

C

H2, Hyperconjugative structure =3
So, stability of carbocations 2<4<1<3 (option a).