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Question 1. Which inorganic compound is commonly used as an antacid due to its ability to neutralize stomach acid? A) Sodium bicarbonate B) Calcium carbonate C) Magnesium hydroxide D) Aluminum hydroxide Answer: B) Calcium carbonate Explanation: Calcium carbonate is an effective antacid that neutralizes gastric acid, providing relief from indigestion and heartburn. It is commonly used due to its rapid action and high buffering capacity. Question 2. Which essential electrolyte is primarily responsible for maintaining nerve impulse transmission and muscle contraction? A) Sodium B) Potassium C) Calcium D) Chloride Answer: B) Potassium Explanation: Potassium is crucial for maintaining membrane potential and proper functioning of nerve impulses and muscle contractions, especially in cardiac and skeletal muscles.
Question 3. Which gas is used in anesthesia for its rapid onset and easy control? A) Oxygen B) Nitrous oxide C) Carbon dioxide D) Helium Answer: B) Nitrous oxide Explanation: Nitrous oxide is an inhalational anesthetic known for its rapid onset, quick recovery, and analgesic properties, making it suitable for dental and minor surgical procedures. Question 4. Which dental product acts as an astringent and helps reduce bleeding in minor oral mucosal injuries? A) Benzocaine B) Alum C) Fluoride gel D) Chlorhexidine Answer: B) Alum
Answer: A) Melting point Explanation: Melting point determination is a vital quality control test to confirm the purity and identity of inorganic pharmaceuticals as per pharmacopoeial standards. Question 7. Which classification best describes benzene in organic chemistry? A) Alkane B) Alkene C) Aromatic hydrocarbon D) Alcohol Answer: C) Aromatic hydrocarbon Explanation: Benzene is an aromatic hydrocarbon characterized by a conjugated pi-electron system, giving it aromatic stability. Question 8. What is the primary mechanism of action of aspirin? A) Inhibition of cyclooxygenase enzymes B) Blockade of histamine receptors C) Activation of opioid receptors D) Inhibition of angiotensin-converting enzyme
Answer: A) Inhibition of cyclooxygenase enzymes Explanation: Aspirin irreversibly inhibits cyclooxygenase (COX-1 and COX-2), reducing prostaglandin synthesis, which mediates pain, inflammation, and fever. Question 9. Which organic compound class is characterized by a hydroxyl group attached to an aromatic ring? A) Phenols B) Alcohols C) Ethers D) Aldehydes Answer: A) Phenols Explanation: Phenols contain a hydroxyl group directly attached to an aromatic ring, exhibiting distinctive acidic properties. Question 10. Which stereochemical concept explains the existence of enantiomers? A) Optical isomerism B) Geometric isomerism C) Structural isomerism D) Chain isomerism
Answer: C) Proteins Explanation: Proteins, especially enzymes, catalyze biochemical reactions, making them essential for metabolic processes. Question 13. Which is an example of a heterocyclic compound that contains nitrogen in its ring? A) Benzene B) Pyridine C) Toluene D) Naphthalene Answer: B) Pyridine Explanation: Pyridine is a heterocyclic aromatic compound with a six- membered ring containing one nitrogen atom. Question 14. In drug-receptor interactions, which type of bond is most commonly involved? A) Covalent bonds B) Ionic bonds C) Hydrogen bonds D) Van der Waals forces
Answer: C) Hydrogen bonds Explanation: Hydrogen bonds are critical in drug-receptor interactions, providing specificity and reversible binding essential for pharmacological activity. Question 15. Which phase of drug metabolism involves oxidation, reduction, or hydrolysis reactions? A) Phase I reactions B) Phase II reactions C) Conjugation reactions D) Elimination reactions Answer: A) Phase I reactions Explanation: Phase I involves functionalization reactions such as oxidation, reduction, and hydrolysis, often introducing or exposing functional groups. Question 16. Which of the following drugs acts primarily by antagonizing histamine H1 receptors? A) Diphenhydramine B) Ranitidine C) Omeprazole
B) Spectroscopy C) Titration D) Gravimetric analysis Answer: A) Chromatography Explanation: Chromatography separates components based on differential affinities for stationary and mobile phases, widely used in pharmaceutical analysis. Question 19. In pharmaceutical calculations, how is isotonicity typically achieved? A) By adjusting osmotic pressure with appropriate salts B) By diluting with water C) By adding preservatives D) By increasing drug concentration Answer: A) By adjusting osmotic pressure with appropriate salts Explanation: Isotonicity ensures solutions have the same osmotic pressure as body fluids, usually achieved by adding salts like sodium chloride. Question 20. Which unit operation in pharmaceutical manufacturing involves reducing the particle size of solid drugs?
A) Granulation B) Milling C) Compression D) Coating Answer: B) Milling Explanation: Milling involves mechanical reduction of particle size, essential for enhancing dissolution and uniformity. Question 21. Which sterilization method is most suitable for heat- sensitive pharmaceuticals? A) Autoclaving (steam sterilization) B) Gaseous sterilization (ethylene oxide) C) Dry heat sterilization D) Filtration Answer: D) Filtration Explanation: Filtration removes microorganisms physically and is suitable for heat-sensitive products like certain liquids and vaccines. Question 22. Which packaging material is most appropriate for moisture-sensitive drugs?
A) Tray drying B) Freeze drying (lyophilization) C) Spray drying D) Desiccation Answer: B) Freeze drying (lyophilization) Explanation: Freeze drying removes water via sublimation under vacuum, preserving heat-sensitive materials. Question 25. Which is a common material used for the sterilization of heat-sensitive solutions? A) Ethylene oxide gas B) Autoclaving C) Dry heat oven D) UV radiation Answer: A) Ethylene oxide gas Explanation: Ethylene oxide sterilizes heat-sensitive materials by alkylation of microbial DNA, suitable for plastics and delicate drugs. Question 26. Which preformulation study evaluates the drug's stability, solubility, and compatibility?
A) Compatibility study B) Dissolution testing C) Stability testing D) Preformulation study Answer: D) Preformulation study Explanation: Preformulation assesses physical and chemical properties critical for developing stable formulations. Question 27. Which step is involved in the scale-up process in pharmaceutical manufacturing? A) Transitioning from laboratory to production scale B) Conducting initial stability studies C) Performing bioequivalence studies D) Marketing and distribution planning Answer: A) Transitioning from laboratory to production scale Explanation: Scale-up involves increasing batch size while maintaining quality, efficiency, and reproducibility. Question 28. Which pharmacokinetic parameter indicates the time required for plasma concentration to reduce by half?
A) Atorvastatin B) Amlodipine C) Metoprolol D) Enalapril Answer: A) Atorvastatin Explanation: Atorvastatin inhibits HMG-CoA reductase, reducing cholesterol synthesis and lowering plasma LDL levels. Question 31. Which class of drugs is primarily used to treat peptic ulcers by reducing gastric acid secretion? A) Proton pump inhibitors B) Antacids C) H2 receptor antagonists D) Prostaglandins Answer: C) H2 receptor antagonists Explanation: H2 receptor antagonists like ranitidine block histamine- mediated acid secretion, reducing gastric acidity. Question 32. Which type of receptor is primarily involved in the action of adrenergic drugs?
A) Cholinergic receptors B) Adrenergic receptors C) Opioid receptors D) Serotonergic receptors Answer: B) Adrenergic receptors Explanation: Adrenergic drugs act on adrenergic receptors (alpha and beta) to modulate sympathetic nervous system responses. Question 33. Which of the following is a phase II metabolic reaction? A) Glucuronidation B) Oxidation C) Hydrolysis D) Reduction Answer: A) Glucuronidation Explanation: Glucuronidation is a conjugation phase II reaction, increasing water solubility for excretion. Question 34. Which class of drugs acts by blocking nerve conduction by inhibiting sodium channels? A) Local anesthetics
B) Drugs and Cosmetics Act, 1940 C) Pharmacy Act, 1948 D) Poisons Act, 1919 Answer: A) Narcotic Drugs and Psychotropic Substances Act, 1985 Explanation: This act regulates the manufacture, possession, sale, and transport of narcotic and psychotropic substances in India. Question 37. Which ethical principle emphasizes obtaining informed consent from patients before treatment? A) Autonomy B) Beneficence C) Non-maleficence D) Justice Answer: A) Autonomy Explanation: Respect for autonomy involves informing patients and obtaining voluntary consent for medical interventions. Question 38. Which is a primary function of the Indian Pharmacopoeia? A) To establish standards for drug quality and purity B) To regulate drug prices
C) To license pharmaceutical companies D) To oversee clinical trials Answer: A) To establish standards for drug quality and purity Explanation: The IP sets official standards for identity, purity, and strength of medicinal substances in India. Question 39. Which inorganic electrolyte is vital for blood clotting and bone health? A) Calcium B) Sodium C) Potassium D) Magnesium Answer: A) Calcium Explanation: Calcium plays a key role in blood coagulation and maintaining bone strength. Question 40. Which property is characteristic of a non-Newtonian fluid? A) Viscosity remains constant regardless of shear rate B) Viscosity changes with shear rate C) Exhibits no flow under stress
