AIM • KMU Exam Practice

Curriculum scope follows the supplied Forensic Medicine outcomes for mineral acids, alkalis, organic acids and cyanides. :contentReference[oaicite:0]{index=0}

Question:

During a forensic case review, an adult is reported to have swallowed approximately 8 mL of a concentrated mineral acid. The substance is one for which traditional undergraduate toxicology texts quote a fatal dose of about 5–10 mL. Which poison best fits this estimate?

Options:

Correct Answer: Sulphuric acid

Explanation: The traditionally quoted approximate fatal dose of concentrated sulphuric acid is about 5–10 mL; actual lethality varies with concentration, amount and treatment.

Question:

A medicolegal record describes death approximately 18 hours after ingestion of a concentrated mineral acid associated with severe gastrointestinal corrosion. Which traditionally taught fatal period best matches sulphuric acid poisoning?

Options:

Correct Answer: 12–24 hours

Explanation: A traditional forensic teaching value for fatal period after severe sulphuric acid ingestion is approximately 12–24 hours.

Question:

An adult is suspected of ingesting approximately 12 mL of a concentrated acid used in chemical manufacture and metal processing. Which poison has a traditionally quoted fatal dose in the range of 10–15 mL?

Options:

Correct Answer: Nitric acid

Explanation: Concentrated nitric acid has a traditionally quoted approximate fatal dose of 10–15 mL in undergraduate forensic toxicology.

Question:

A laboratory bottle contains a strong acid that was initially colorless but has developed a yellow tint while standing. Which explanation best accounts for this change?

Options:

Correct Answer: Dissolved nitrogen oxides

Explanation: Pure nitric acid is colorless, but dissolved nitrogen oxides can give stored preparations a yellow appearance.

Question:

A forensic toxicology report records death after ingestion of a substance traditionally called carbolic acid. The amount consumed was estimated at 12 g. Which interpretation is most appropriate?

Options:

Correct Answer: It lies within the traditionally quoted fatal range

Explanation: The traditionally quoted fatal dose of phenol is approximately 10–15 g, although clinical outcome depends on actual absorption and treatment.

Question:

An adult with severe phenol poisoning deteriorates rapidly despite supportive care. Which traditionally taught fatal period is most consistent with severe carbolic acid poisoning?

Options:

Correct Answer: 3–4 hours

Explanation: Severe phenol poisoning is traditionally associated with a fatal period of roughly 3–4 hours because systemic toxicity may develop rapidly.

Question:

A chemical store contains colorless or white crystalline material used as a disinfectant and in industrial chemical processes. On prolonged exposure to air and light, the material may become pinkish. Which poison is being described?

Options:

Correct Answer: Phenol

Explanation: Pure phenol may appear as colorless or white crystals and can develop a pinkish discoloration on exposure to air and light.

Question:

A patient with suspected oxalic acid poisoning dies approximately 90 minutes after a large ingestion. Which traditionally taught fatal period is most consistent with this course?

Options:

Correct Answer: 1–2 hours

Explanation: Severe oxalic acid poisoning may cause death within approximately 1–2 hours because metabolic and renal toxicity can evolve quickly.

Question:

A forensic toxicologist compares two forms of cyanide. One is highly volatile and lethal in an approximate dose of 50–60 mg, while a commonly encountered salt requires a larger amount. Which compound is the first substance?

Options:

Correct Answer: Hydrogen cyanide

Explanation: A traditional approximate fatal dose for hydrogen cyanide is 50–60 mg, markedly smaller than the amount quoted for potassium cyanide.

Question:

In a teaching discussion, students are asked to compare the approximate lethal quantities of cyanide compounds. Which range is traditionally quoted for potassium cyanide?

Options:

Correct Answer: 200–300 mg

Explanation: Potassium cyanide has a traditionally quoted fatal dose of approximately 200–300 mg in undergraduate forensic teaching.

Question:

An industrial accident involves a colorless, highly volatile cyanide compound. A worker dies within a few minutes. Which fatal period is traditionally associated with severe hydrogen cyanide exposure?

Options:

Correct Answer: 2–10 minutes

Explanation: Severe hydrogen cyanide poisoning may be rapidly fatal, with a traditionally quoted fatal period of about 2–10 minutes.

Question:

A worker in a metal-extraction facility is exposed to a toxic compound used in processing metals. Which toxic agent from the current curriculum is particularly associated with this industrial setting?

Options:

Correct Answer: Cyanide compounds

Explanation: Cyanide compounds have important industrial uses including metal extraction and therefore have occupational forensic relevance.

Question:

A toxicology specimen is obtained from a container holding a white crystalline cyanide salt rather than a volatile liquid. Which substance best fits this description?

Options:

Correct Answer: Sodium or potassium cyanide

Explanation: Sodium and potassium cyanide are generally encountered as white crystalline salts, unlike volatile hydrogen cyanide.

Question:

After accidental splashing of a concentrated corrosive onto the skin and eyes, a patient reaches the emergency department within minutes. Which immediate measure best limits continued local chemical injury?

Options:

Correct Answer: Copious irrigation with water

Explanation: Rapid removal of contaminated clothing and thorough irrigation reduce ongoing corrosive contact with skin or ocular tissues.

Question:

At autopsy after suspected strong alkali ingestion, the esophageal mucosa is soft, swollen and slimy with deep necrotic areas. Which interpretation best fits this appearance?

Options:

Correct Answer: Liquefactive corrosive destruction

Explanation: Strong alkalis may leave soft, swollen and slimy necrotic mucosa because tissue is liquefied during corrosive injury.

Question:

At postmortem examination after ingestion of a colorless corrosive acid with irritating fumes, the stomach shows gray-white to brownish erosive lesions and hemorrhage without a distinctive pigment reaction. Which poison is most compatible with these findings?

Options:

Correct Answer: Hydrochloric acid

Explanation: Hydrochloric acid can produce gray-white, brownish or dark corrosive mucosal injury without the characteristic tissue-color reaction of some other acids.

Question:

A household survey identifies several hazardous products. Which item is most appropriately classified as a common domestic corrosive rather than a medicinal or garden poison?

Options:

Correct Answer: Drain-cleaning alkali

Explanation: Strong alkalis such as sodium hydroxide are important domestic corrosives because they are commonly present in drain-cleaning preparations.

Question:

A chemistry technician is asked to separate the corrosives into mineral and organic groups for a toxicology demonstration. Which pair belongs to the organic-acid group discussed in this topic?

Options:

Correct Answer: Carbolic acid and oxalic acid

Explanation: Phenol (carbolic acid) and oxalic acid are included among the organic corrosive poisons in the supplied learning material.

Question:

Following deliberate throwing of a corrosive liquid, a victim sustains severe facial burns and permanent disfigurement. Which poison has particular forensic importance because of its historical association with corrosive assault?

Options:

Correct Answer: Sulphuric acid

Explanation: Sulphuric acid has important forensic relevance in corrosive assaults because concentrated acid can cause devastating burns and permanent disfigurement.

Question:

A worker exposed to a cyanide salt through ingestion has gastric irritation at autopsy, while another victim exposed to cyanide gas does not show comparable local gastric injury. Which factor best explains this difference?

Options:

Correct Answer: Route and chemical form of exposure

Explanation: Ingested cyanide salts may directly irritate the stomach, whereas inhaled hydrogen cyanide primarily produces rapid systemic toxicity without the same local gastric contact.