List of Toxicology Important Questions (Multiple Choice Questions)

Multiple Choice Questions

1. Toxicology is the study of:
A. Drugs and their therapeutic effects
B. Harmful effects of chemicals and other agents on living organisms
C. Microorganisms causing diseases
D. Surgical procedures

2. Which of the following is a major route of exposure to toxic substances?
A. Oral
B. Inhalation
C. Dermal
D. All of the above

3. Which historical disaster involved the release of methyl isocyanate (MIC)?
A. Chernobyl disaster
B. Bhopal gas tragedy
C. Agent Orange incident
D. Minamata disaster

4. Agent Orange is primarily associated with:
A. Nuclear radiation
B. Herbicide exposure
C. Heavy-metal poisoning
D. Carbon monoxide poisoning

5. Which factor can influence the toxicity of a substance?
A. Dose
B. Route of exposure
C. Duration of exposure
D. All of the above

6. The relationship between the amount of exposure and the harmful effect produced is commonly described by:
A. Dose-response relationship
B. Therapeutic index
C. Bioavailability
D. Clearance

7. Risk assessment in toxicology is primarily concerned with:
A. Identifying and estimating potential health risks
B. Increasing drug absorption
C. Measuring blood pressure
D. Treating infections

8. Risk management refers to:
A. Identification of a poison
B. Actions taken to control or reduce identified risks
C. Measurement of toxicity only
D. Diagnosis of infectious diseases

9. Chernobyl is historically associated with:
A. Pesticide poisoning
B. Nuclear radiation exposure
C. Heavy-metal contamination
D. Food poisoning

10. The mechanism by which a toxic substance produces harmful effects in the body is called:
A. Mechanism of toxicity
B. Pharmacokinetics
C. Therapeutic action
D. Drug formulation

11. Which of the following is NOT a routine vital sign?
A. Body temperature
B. Pulse rate
C. Blood pressure
D. Blood glucose

12. In the initial management of poisoning, ABC primarily stands for:
A. Airway, Breathing, Circulation
B. Assessment, Blood, Consciousness
C. Airway, Blood, Consciousness
D. Assessment, Breathing, Cardiac function

13. A toxidrome is best described as:
A. A group of clinical signs and symptoms characteristic of a type of poisoning
B. A laboratory test for poison
C. A method of drug administration
D. A type of antidote

14. Activated charcoal is used in poisoning mainly to:
A. Increase gastric acid secretion
B. Adsorb certain toxic substances in the gastrointestinal tract
C. Induce vomiting
D. Neutralize blood pH

15. Gastric lavage is a method of:
A. Skin decontamination
B. Eye decontamination
C. Gastrointestinal decontamination
D. Pulmonary decontamination

16. Which of the following is used for decontamination of the skin after exposure to a toxic substance?
A. Thorough washing with water and appropriate cleansing agent
B. Gastric lavage
C. Activated charcoal
D. Whole bowel irrigation

17. Convulsions in a poisoned patient are also known as:
A. Arrhythmias
B. Seizures
C. Ataxia
D. Cyanosis

18. Which of the following is an extracorporeal technique that may be used to enhance elimination of certain toxins?
A. Hemodialysis
B. Gastric lavage
C. Emesis
D. Catharsis

19. The primary purpose of administering an antidote is to:
A. Increase absorption of the poison
B. Counteract or reduce the toxic effects of a specific poison
C. Increase body temperature
D. Induce vomiting in every poisoned patient

20. Which of the following is an important component of comprehensive care for poisoning?
A. Nursing care
B. Psychosocial and psychiatric care
C. Medical stabilization
D. All of the above

21. A patient exposed to a toxic substance develops pinpoint pupils, respiratory depression and CNS depression. This clinical presentation is best described as:
A. Anticholinergic toxidrome
B. Cholinergic toxidrome
C. Opioid toxidrome
D. Sympathomimetic toxidrome

22. Which factor most directly determines the severity of toxicity following exposure to a chemical?
A. Colour of the chemical
B. Dose and duration of exposure
C. Packaging of the chemical
D. Route of manufacture

23. In a severely poisoned unconscious patient, the first priority during emergency management is to:
A. Administer activated charcoal
B. Perform gastric lavage
C. Assess and secure the airway
D. Administer a universal antidote

24. Which method is most appropriate for reducing absorption of many suitable toxins already present in the gastrointestinal tract?
A. Activated charcoal
B. Catharsis alone
C. Forced diuresis in every poisoning
D. Immediate emesis in every poisoning

25. Risk assessment in toxicology primarily involves evaluation of:
A. Hazard, exposure and dose-response relationship
B. Colour, odour and taste
C. Manufacturing cost and packaging
D. Route of administration only

Answer Key: 1-B, 2-D, 3-B, 4-B, 5-D, 6-A, 7-A, 8-B, 9-B, 10-A, 11-D, 12-A, 13-A, 14-B, 15-C, 16-A, 17-B, 18-A, 19-B, 20-D. 21-C, 22-B, 23-C, 24-A, 25-A.

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You may like to read more:

1. List of Toxicology Important Questions (Problem Based Questions)

2. List of Toxicology Important Questions (Long Answer Questions) 

3. List of Toxicology Important Questions (Short Questions)

4. List of Toxicology Important Questions (Multiple Choice Questions)

5. List of Major Toxicological Disasters in History: Chemical, Pharmaceutical, Pesticide, Fertilizer and Heavy-Metal Poisoning Events Worldwide

6. How you define the terms NOEL, NOEAL, LOEL and LOEAL in toxicology with example? 

7. WHO Toxicity Classification of Pesticides or WHO Toxic Categories

8. Principles, Assessment and Management of Poisoning: A Complete Guide to Clinical Toxicology

9. Mechanisms of Chemical Toxicity and Cellular Injury

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