Question 6 - 2021 (17 Mar Shift 2)

Choose the correct statement regarding the formation of carbocations A and B given:

$\text{CH}_3\text{CH}_2\text{CH}=\text{CH}_2 + \text{HBr} \rightarrow$ “A”: $\text{CH}_3\text{CH}_2\text{CH}_2\dot{\text{C}}\text{H}_2^+$ (primary carbocation) “B”: $\text{CH}_3\text{CH}_2\dot{\text{C}}\text{H}\text{CH}_3^+$ (secondary carbocation)

(1) Carbocation B is more stable and formed relatively at faster rate

(2) Carbocation A is more stable and formed relatively at slow rate

(3) Carbocation B is more stable and formed relatively at slow rate

(4) Carbocation A is more stable and formed relatively at faster rate