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What kind of isomerism is shown by C6H5C≡N and C6H5N≡C?

1. Positional isomerism
2. Functional isomerism
3. Dextroisomerism
4. Position isomerism

Correct answer: Functional isomerism

Solution

C6H5-C#N is benzonitrile (a nitrile) and C6H5-N#C is phenyl isocyanide; same molecular formula but different functional groups, so they are functional isomers.

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