Isomerism and StereochemistryhardMCQ SINGLE

When multiple types of structural isomerism are simultaneously possible between two compounds, whichIsomerism and Stereochemistry Chemistry Question

Question

When multiple types of structural isomerism are simultaneously possible between two compounds, which of the following priority sequences is correctly used to determine their primary isomeric relationship?

Answer: B

💡 Solution & Explanation

When establishing the relationship between two isomers, the universally accepted FMCP priority rule is applied: Functional isomerism > Metamerism > Chain isomerism > Positional isomerism. If tautomerism or ring-chain isomerism exists, they take priority over functional group isomerism.

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