Question

The order of increasing reactivity of the following compounds towards $HCl$ will be
$\left(1\right)$ $CH_{2}=CH_{2}$
$\left(\right.2\left.\right)$ $\left(\right.CH_{3}\left(\left.\right)_{2}C=CH_{2}$
$\left(3\right)$ $CH_{3}CH=CHCH_{3}$

• A. $1 < 2 < 3$
• B. $1 < 3 < 2$
• C. $3 < 2 < 1$
• D. $2 < 1 < 3$

Answer 1

Answer: (B)

Reactivity of alkene towards electrophilic addition depends upon nature of electron rich double bond and stability of carbocation formed.