Stinging hair of nettle leaves inject fluid in the human body causing burning pain. The fluid is
[amp_mcq option1=”Methanoic acid” option2=”Tartaric acid” option3=”Hydrochloric acid” option4=”Sulphuric acid” correct=”option1″]
This question was previously asked in
UPSC CDS-2 – 2022
The stinging sensation and burning pain caused by contact with nettle leaves (like *Urtica dioica*) are due to fine, brittle hairs (trichomes) on the plant surface that break off and inject chemicals into the skin. The fluid injected contains several irritants, including histamine, acetylcholine, serotonin, and notably, formic acid, which is also known as methanoic acid. Methanoic acid is a simple carboxylic acid that contributes significantly to the burning and stinging sensation.
Nettle stings inject chemicals including methanoic acid (formic acid).