Draw or recognise pairs of optical isomers.

In the subtopic Optical isomerism (A-level only), this AQA A-Level Chemistry 7405 learning objective focuses on draw or recognise pairs of optical isomers. It belongs to Optical isomerism (A-level only), so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include optical isomer. Optical Isomer. means one of a pair of isomers that are mirror images of each other and differ in the direction they rotate plane-polarised light Avoid the mistake of students frequently draw optical isomers that do not have the correct spatial arrangement of substituents around the chiral carbon; instead, ensure that when drawing optical isomers, the groups attached to the chiral carbon are arranged in such a way that they create a mirror image, maintaining the correct stereochemistry For exam answers, use molecular models or software to visualize and rotate pairs of optical isomers to see how they differ in 3D space