Achiral is a term used in chemistry to describe a molecule or an object that is not chiral. Chirality is a property of a molecule or an object that makes it non-superimposable on its mirror image. In other words, a chiral molecule or object cannot be transformed into its mirror image by any rotation or translation. If a molecule is achiral, it means that it lacks chirality and is therefore superimposable on its mirror image. Achiral molecules possess a plane of symmetry or a center of symmetry, which allows them to be transformed into their mirror image without any change in their properties. Examples of achiral molecules include carbon dioxide (CO2), methane (CH4), and water (H2O). These molecules have symmetrical structures that allow them to be superimposed on their mirror image.
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