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HESI A2 Exam Prep 2026

Real HESI A2 Questions.
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Practice with exam-accurate HESI A2 questions that match the real test in format, difficulty, and logic. Trusted by students accepted into nursing programs across the United States.

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About Organic Chemistry (Functional Groups, Hydrocarbons)

An ester contains a carbonyl group (C=O) bonded to an oxygen that's bonded to another carbon- key to many fragrances and medications.

Related Topics

Atomic StructurePeriodic Table & Periodic TrendsChemical Bonds (Ionic, Covalent, Metallic)Chemical Reactions & Balancing EquationsStoichiometry & Mole Concept
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Organic Chemistry (Functional Groups, Hydrocarbons) HESI A2 Practice Questions

Free Organic Chemistry (Functional Groups, Hydrocarbons) practice questions for the HESI A2 exam with detailed rationales.

Question 1 of 2

A nurse is reviewing a medication label that contains an ester functional group. Which of the following best describes the structure of an ester?

gen which is bonded to another carbon

A. Contains –OH and –NH₂ groups bonded to a carbon
B. Contains a carbonyl group (C=O) bonded to a hydroxyl group
D. Contains only carbon and hydrogen atoms in a chain
C. Contains a carbonyl group (C=O) bonded to an oxygen which is bonded to another carbon