Chemistry - Nomenclature Question with Solution | TestHub

Question Explanation:

The question asks which given compounds are homocyclic hydrocarbons, meaning the ring contains only carbon atoms and the molecule contains only carbon and hydrogen.

Concept Used:

Homocyclic Compounds, Heterocyclic Compounds, Hydrocarbons.

Solution:

A homocyclic hydrocarbon must have (i) a ring made only of carbon atoms and (ii) only C and H in the entire molecule.

(I) Cyclohexane: Carbocyclic ring; only C and H → homocyclic hydrocarbon

(II) Piperidine: Ring contains N → heterocyclic

(III) Tetrahydrofuran: Ring contains O → heterocyclic

(IV) Cyclohexanol: Ring is carbocyclic, but –OH introduces O → not a hydrocarbon

(V) Aniline: Benzene ring is carbocyclic, but –NH₂ introduces N → not a hydrocarbon

(VI) 3-Methylpiperidine: Ring contains N → heterocyclic

(VII) Methylcyclohexane: Carbocyclic ring; only C and H → homocyclic hydrocarbon

(VIII) 1, 3, 5-Trimethylcyclohexane: Carbocyclic ring; only C and H → homocyclic hydrocarbon

Final Answer: Option (C)