OPSC OAS 2020 PrelimsScience & TechnologyQuestion 13
Solved previous year question from the OPSC OAS/OCS 2020 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
Bee sting causes severe pain and burning sensation due to the presence of:
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Answer & Explanation
Correct answer: (D) Methanoic acid
- Bee sting causes severe pain and burning sensation due to the presence of Methanoic acid, which is commonly known as Formic acid (HCOOH). When a bee stings, it injects venom containing formic acid into the skin, causing intense pain, burning sensation, swelling, and redness.
the other options are incorrect
| Option | Common Name | Details |
|---|---|---|
| (A) Acetic acid | Vinegar acid (CH₃COOH) | Found in vinegar, not in bee venom |
| (B) Sulfuric acid | Oil of vitriol (H₂SO₄) | Strong mineral acid used in industries, not found in biological stings |
| (C) Citric acid | Citrus acid (C₆H₈O₇) | Found in citrus fruits like lemon, orange, not in bee venom |
