Give reason. In case of optically active alkyl halides, SN1 reactions are accompanied by racemisation

Explanation

Since the carbocation is planar
or
`sp^(2)` hybrid carbocation
or
Nucleophile can attack the carbocation from both the sides.
The carbocation has `sp^(2)`-hybrid carbon atoms with planar structure. Thus, nucleophile can attack from both the sides equally to for d and l-isomers in equal proportional.