Corrosive Agents and Asphyxiant Gases
- Previous year questions on Corrosive Agents and Asphyxiant Gases for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Forensic Medicine section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 24 live questions in Corrosive Agents and Asphyxiant Gases.
- 4 of 24 questions carry a verified exam year: 2017, 2019.
- Forensic Medicine is worth about 10 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 5 Sept 2026.
Q1.Which of the following statement is true regarding "Cyanide"?
- AOnly minimally inhibits the ETC because cytochrome oxidase is the terminal component of the chain
- BInhibits mitochondrial respiration but energy production is unaffected
- CAlso binds the copper of cytochrome oxidase
- DBind to Fe+++ of cytochrome a3✓ Correct answer
Q2.Smell of bitter almonds is seen in poisoning with
- APhosphorus
- BHydrocyanic acid✓ Correct answer
- CNitric acid
- DOxalic acid
Q3.Gas used in rapid airbag inflation
- ASodium azide✓ Correct answer
- BNitrocellulose
- CMercuric nitrate
- DPotassium nitrate
Q4.Ramesh, 30 yrs old male, the diagnosed case of CO poisoning presented with syncope or coma with intermittent convulsions, rapid respirations, tachycardia with a weak pulse and pink or red discoloration of the skin. Estimated percentage of COHb is
- A30 to 40 %
- B40 to 50 %
- C50 to 60 %✓ Correct answer
- D60 to 70 %
Q5.A patient was found to have pink coloured skin and mucosa, bitter almond smell from breath and frothy discharge. Cause of death in this patient;
- ACyanide poisoning✓ Correct answer
- BCO poisoning
- CH2S poisoning
- DDatura poisoning
Q6.Gastric lavage is allowed in which corrosive poisoning?
- APaint thinner ingestion
- BLysol ingestion✓ Correct answer
- CCrude toilet disinfectant ingestion
- DBattery acid ingestion
Q7.Calcium gluconate can be given in which acid poisoning?
- ASulphuric acid
- BHydrofluoric acid✓ Correct answer
- CNitric acid
- DCarbolic acid
Q8.In Hydrofluoric acid poisoning, which electrolyte abnormality is not seen:
- AHypernatremia✓ Correct answer
- BHypomagnesemia
- CHypocalcemia
- DHyperkalemia
Q9.Death due to smoke inhalation is due to:
- AHypoxemia
- BAnemic hypoxia✓ Correct answer
- CIschemic hypoxia
- DAll of the above
Q10.A man throws sulphuric acid on the face of his wife after a fight following which she comes to the emergency for supportive management. All of these statements are true about chemical burns except:
- ABlisters are present✓ Correct answer
- BUlcerated patches are present
- CAbsence of singeing of hairs
- DCoagulation necrosis occurs at the site of burn
Answer key
Q1: D. Bind to Fe+++ of cytochrome a3; Q2: B. Hydrocyanic acid; Q3: A. Sodium azide; Q4: C. 50 to 60 %; Q5: A. Cyanide poisoning; Q6: B. Lysol ingestion; Q7: B. Hydrofluoric acid; Q8: A. Hypernatremia; Q9: B. Anemic hypoxia; Q10: A. Blisters are present.
Other topics in Forensic Medicine
- Age Estimation from Bone and Teeth
- Determination of Sex, Race and Stature
- Fingerprints, Tattoos and Identifying Marks
- Bharatiya Nyaya Sanhita (BNS), BNSS and BSA
- Medical Ethics, Consent and Professional Negligence
- Diagnosis of Death and Postmortem Changes
- Conduct of the Medicolegal Autopsy
- Blunt and Sharp Force Mechanical Injuries
- Injuries by Body Region
- Burns, Scalds and Cold Injuries
- Firearm and Explosive Blast Wounds
- Hanging, Strangulation and Other Mechanical Asphyxia
- Drowning
- Sexual Assault and Criminal Abortion
- Child Abuse, Infanticide and Starvation Deaths
- General Principles of Poisoning
- Poisoning by Organophosphorus Compounds
- Ethanol and Methanol Poisoning
- Metallic and Non-Metallic Inorganic Irritants
- Plant and Animal Organic Irritant Poisons
- CNS Poisons: Narcotics and Deliriants