Molecules whose mirror image is non-superimposable over them are

known as chiral. Which of the following molecules is chiral in nature?

1. 2 -Bromobutane
2. 1-Bromobutane

3. 2-Bromopropane
4. 2-Bromopropan-2-ol

 
Chiral/asymmetric carbon will indicate carbon where four diffrent atoms or groups are present,
Let see draw the structures of given molecules.