MCQ
The addition of $\text{HBr}$ is easiest with:
  • A
    $\mathrm{CH}_2=\mathrm{CH}-\mathrm{Cl}$
  • B
    $\mathrm{Cl}-\mathrm{CH}=\mathrm{CH}-\mathrm{Cl}$
  • C
    $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2$
  • $\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$

Answer

Correct option: D.
$\left(\mathrm{CH}_3\right)_2 \mathrm{C}=\mathrm{CH}_2$
Addition of $H−X ($Where $x$ is halogen$)$ on alkenes is electrophilic addition reaction
The rate of reaction depends on the stability of intermediate carbocation.
Thus, that carbocation is more stable for cempound $(2).$

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