Question detail

Which statement best describes the relationship between optical isomerism and chirality?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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MCQ

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practice

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Topic

Optical isomerism (A-level only)

Question

A. Optical isomerism is unrelated to chirality.
B. Chirality is a necessary condition for optical isomerism to occur.
C. All chiral molecules exhibit structural isomerism.
D. Optical isomerism can occur without chiral centers.

Answer

Chirality is a necessary condition for optical isomerism to occur.

Explanation

Chirality refers to the property of a molecule having a non-superimposable mirror image, which is essential for optical isomerism. Optical isomers, or enantiomers, arise from chiral centers in molecules, allowing them to rotate plane-polarised light in opposite directions. Therefore, understanding chirality is crucial for recognizing and studying optical isomerism in organic compounds.

Common mistake

Confusing Isomer Types

Students often confuse optical isomerism with structural isomerism, thinking they are the same.

Optical isomerism involves chiral molecules that rotate plane-polarised light, while structural isomerism involves different connectivity of atoms in a molecule. Focus on the definitions and characteristics of each type.

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