Explain: Propan-$2$-ol is symmetric and achiral. (Diagram required)

(N/A) Propan-$2$-ol $(CH_3CHOHCH_3)$ is a symmetric molecule because it contains a plane of symmetry.
The structure shows that the central carbon atom is not bonded to four different groups. It has two identical $-CH_3$ groups attached to the $C^2$ atom,which makes propan-$2$-ol symmetric and therefore an achiral molecule.
Rotating the mirror image $(B)$ of structure $(A)$ by $180^{\circ}$ yields structure $(C)$. Structures $(C)$ and $(A)$ are superimposable on each other. Thus,propan-$2$-ol is an achiral molecule.
Therefore,since propan-$2$-ol is symmetric and achiral,it does not exhibit optical activity.