Explain the difference between asymmetric (chiral) and symmetric (achiral) molecules.

(N/A) The difference between asymmetric (chiral) and symmetric (achiral) molecules is as follows:
| Feature | Asymmetric (Chiral) | Symmetric (Achiral) |
| :--- | :--- | :--- |
| $(i)$ Definition | Molecules where all four groups attached to the carbon atom are different. | Molecules where all four groups attached to the carbon atom are not different. |
| $(ii)$ Property | They exhibit chirality. | They exhibit achirality. |
| $(iii)$ Superimposability | They are non-superimposable on their mirror images. | They are superimposable on their mirror images. |
| $(iv)$ Examples | Left and right hands,feet,$CHClBrI$. | Glass,circle,$CHClBr_2$. |
| $(v)$ Optical Activity | They are optically active. e.g.,$Butan-2-ol$. | They are optically inactive. e.g.,$Propan-2-ol$.