Chemistry - Halogen Derivative Question with Solution | TestHub

$-\mathrm{Br}$ is good leaving group than $-\mathrm{Cl}$ due to low bond dissociation energy of $\mathrm{C}-\mathrm{Br}$ bond. $2^{\circ }$ carbocation is more stable than $1^{\circ }$ carbocation. More substituted alkene is more stable (Saytzeff's rule).