How many chiral stereoisomers can be drawn for 2 - bromo - 3 - chlorobutane ?

Answer

4

Explanation

`CH_(3)-overset(**)underset(Br)underset(|)CH-overset(**)underset(Cl)underset(|)CH-CH_3` Since the compound has two different chiral carbons, therefore `2^2 = 4` optical isomers.