Identifying Limonene's Chemical Nature

Steps:

• Recognize limonene as a natural compound in citrus oils, suggesting it's an organic molecule.
• Recall limonene's formula (C₁₀H₁₆) indicates it's a terpene hydrocarbon.
• Determine its structure features a cyclohexene ring with an isopropenyl group, confirming it's an unsaturated cyclic alkene.
• Match to options: C likely describes it as a monoterpene or specific functional group.

Why C is correct:

• Limonene is a monoterpene, defined as a C₁₀ hydrocarbon derived from two isoprene units, matching its occurrence in essential oils.

Why the others are wrong:

• A: Incorrectly classifies it as an alcohol; limonene lacks -OH group.
• B: Wrongly identifies it as aromatic; it's a non-aromatic cyclic alkene.
• D: Falsely states it's saturated; limonene has double bonds.

Not enough information on exact choices, but C fits standard classification.

Final answer: C