$$
$$
$H_3—C=C{H}_2 + CHl \underset{rule}{\overset{Markownikoff\text{'}s}{\to }}$$Cl$
$|$
$H_{3}C—C—C{H}_3$
$|$
$C{H}_3$
$2-chloro-2-methlpropane$

Electrophilic addition reaction takes place in accorciance with Markownikatt’s rule,

We know that 3° carbocation is more stable than 1° carbocation because in further step

° carbocation is further attacked by CI ion.

$C{H}_{3 } C{H}_3$
$| |$
$H_{3}C—C+C{l}^{-} \to H_{3}C—C—Cl$
$| |$
$C{H}_3 C{H}_3$
$2-chloro-methlpropane$