Which one among the following is present in the nettle leaf hairs that causes burning pain?
- A. Methanoic acid ✓
- B. Ethanoic acid
- C. Benzoic acid
- D. Acetic acid
Correct Answer: A. Methanoic acid
Explanation
The stinging hair of nettle leaves injects methanoic acid (formic acid) when touched, causing a burning pain.
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