Question:
A poison which is luminous, translucent and waxy is
A poison which is luminous, translucent and waxy is
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Think of the poison stored under water that glows in the dark and smells of garlic.
Updated On: Jun 24, 2026
- Iodine
- Ammonium bromide
- Cobra venom
- Yellow phosphorus
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The Correct Option is D
Solution and Explanation
Step 1: Identify the physical characteristics described in the stem. The poison is luminous (glows in the dark), translucent and waxy in consistency.
Step 2: Yellow phosphorus is a soft, waxy, translucent solid that is luminous in the dark because it slowly oxidises in air, producing a faint greenish glow. This property is the classic identifying feature in forensic toxicology.
Step 3: Compare with the other options. Iodine is a lustrous grayish-black crystalline solid that sublimes to violet vapour, not waxy or luminous. Ammonium bromide is a colourless to white crystalline salt. Cobra venom is a biological proteinaceous neurotoxin, not a waxy luminous solid.
Step 4: Yellow phosphorus poisoning classically causes the garlicky odour of the breath and stools, and "smoking stool" syndrome where the faeces may be luminous. The hepatotoxic course follows the "three stages" pattern.
Conclusion: The luminous, translucent, waxy poison is yellow phosphorus, so the correct answer is option 4.
Step 2: Yellow phosphorus is a soft, waxy, translucent solid that is luminous in the dark because it slowly oxidises in air, producing a faint greenish glow. This property is the classic identifying feature in forensic toxicology.
Step 3: Compare with the other options. Iodine is a lustrous grayish-black crystalline solid that sublimes to violet vapour, not waxy or luminous. Ammonium bromide is a colourless to white crystalline salt. Cobra venom is a biological proteinaceous neurotoxin, not a waxy luminous solid.
Step 4: Yellow phosphorus poisoning classically causes the garlicky odour of the breath and stools, and "smoking stool" syndrome where the faeces may be luminous. The hepatotoxic course follows the "three stages" pattern.
Conclusion: The luminous, translucent, waxy poison is yellow phosphorus, so the correct answer is option 4.
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