📌 Introduction
Pharmaceutical Chemistry is a core subject for pharmacy students preparing for competitive exams. To help you revise quickly and effectively, here are top 30 important MCQs with clear explanations. These questions are based on important concepts, previous trends, and exam patterns.
🧪 Pharmaceutical Chemistry MCQs (With Explanation)
🔹 1. Which of the following is a beta-lactam antibiotic?
A) Ciprofloxacin
B) Amoxicillin
C) Tetracycline
D) Chloramphenicol
👉 Answer: B) Amoxicillin
Explanation: Amoxicillin contains a beta-lactam ring which inhibits bacterial cell wall synthesis.
🔹 2. Sulfonamides act by inhibiting:
A) DNA synthesis
B) Folic acid synthesis
C) Protein synthesis
D) Cell wall synthesis
👉 Answer: B) Folic acid synthesis
Explanation: Sulfonamides block dihydropteroate synthase, stopping folic acid production in bacteria.
🔹3. Which functional group is present in alcohols?
A) -COOH
B) -OH
C) -NH2
D) -CHO
👉 Answer: B) -OH
Explanation: Alcohols are characterized by the hydroxyl (-OH) functional group.
🔹 4. Aspirin belongs to which class?
A) Antibiotic
B) Analgesic
C) Antiviral
D) Antifungal
👉 Answer: B) Analgesic
Explanation: Aspirin is an NSAID used to reduce pain, fever, and inflammation.
🔹 5. Which drug is used as an antimalarial?
A) Ibuprofen
B) Chloroquine
C) Paracetamol
D) Metformin
👉 Answer: B) Chloroquine
Explanation: Chloroquine interferes with parasite growth in red blood cells.
🔹6. Benzene is classified as:
A) Aliphatic
B) Aromatic
C) Saturated
D) Alkane
👉 Answer: B) Aromatic
Explanation: Benzene has a conjugated ring structure with delocalized electrons.
🔹7. Penicillin acts on:
A) Protein synthesis
B) DNA replication
C) Cell wall synthesis
D) Metabolism
👉 Answer: C) Cell wall synthesis
Explanation: Penicillin inhibits peptidoglycan cross-linking in bacteria.
🔹 8. Which of the following is an NSAID?
A) Morphine
B) Diclofenac
C) Insulin
D) Atropine
👉 Answer: B) Diclofenac
Explanation: Diclofenac reduces inflammation by inhibiting COX enzymes.
🔹9. Functional group in ketones:
A) -CHO
B) -CO-
C) -OH
D) -NH2
👉 Answer: B) -CO-
Explanation: Ketones contain a carbonyl group between two carbon atoms.
🔹10. Vitamin C is:
A) Retinol
B) Ascorbic acid
C) Calciferol
D) Tocopherol
👉 Answer: B) Ascorbic acid
Explanation: Vitamin C is a water-soluble antioxidant.
🔹 11. Which drug is an antihistamine?
👉 Answer: Diphenhydramine
Explanation: It blocks H1 receptors to reduce allergic reactions.
🔹 12. Paracetamol is used as:
👉 Answer: Analgesic & Antipyretic
Explanation: It reduces pain and fever but has weak anti-inflammatory action.
🔹 13. Ether functional group is:
👉 Answer: -O-
Explanation: Ether contains oxygen bonded to two carbon atoms.
🔹 14. Which is a macrolide antibiotic?
👉 Answer: Erythromycin
Explanation: Macrolides inhibit protein synthesis by binding to ribosomes.
🔹 15. Which drug is used for diabetes?
👉 Answer: Metformin
Explanation: It decreases glucose production in the liver.
🔹 16. Alkene contains:
👉 Answer: Double bond
Explanation: Alkenes have at least one C=C bond.
🔹 17. Which is an antifungal drug?
👉 Answer: Fluconazole
Explanation: It inhibits fungal cell membrane synthesis.
🔹 18. Which vitamin is fat-soluble?
👉 Answer: Vitamin A
Explanation: Fat-soluble vitamins are stored in body tissues.
🔹 19. Which drug is a beta-blocker?
👉 Answer: Propranolol
Explanation: It reduces heart rate and blood pressure.
🔹 20. Which is an alkaloid?
👉 Answer: Morphine
Explanation: Alkaloids are nitrogen-containing natural compounds.
🔹 21. Which drug is an antiviral?
👉 Answer: Acyclovir
Explanation: It inhibits viral DNA replication.
🔹 22. Which is a diuretic?
👉 Answer: Furosemide
Explanation: It increases urine output.
🔹 23. Which compound is acidic?
👉 Answer: Carboxylic acid
Explanation: It donates hydrogen ions.
🔹 24. Which drug treats hypertension?
👉 Answer: Amlodipine
Explanation: It relaxes blood vessels.
🔹 25. Which is a steroid drug?
👉 Answer: Prednisolone
Explanation: Steroids reduce inflammation.
🔹 26. Which drug is a proton pump inhibitor?
👉 Answer: Omeprazole
Explanation: It reduces stomach acid production.
🔹 27. Which is a local anesthetic?
👉 Answer: Lidocaine
Explanation: It blocks nerve signal transmission.
🔹 28. Which is an antipyretic drug?
👉 Answer: Paracetamol
Explanation: It reduces fever.
🔹 29. Which is an anticoagulant?
👉 Answer: Heparin
Explanation: It prevents blood clotting.
🔹 30. Which drug is used in asthma?
👉 Answer: Salbutamol
Explanation: It relaxes airway muscles.
📖 Quick Revision Points
Beta-lactam → Cell wall inhibitors
NSAIDs → Pain & inflammation
Antibiotics → Target bacteria
Functional groups → Core chemistry