Stung by hairs of nettle leaves causes burning pain. This is due to th

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Stung by hairs of nettle leaves causes burning pain. This is due to the injection of

Acetic acid
Methanoic acid
Sulphuric acid
Hydrochloric acid
This question was previously asked in
UPSC NDA-1 – 2017
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The burning pain caused by stinging hairs of nettle leaves is primarily due to the injection of chemicals including formic acid, also known by its systematic name methanoic acid (HCOOH). Other irritants like histamine, acetylcholine, and serotonin are also present, but methanoic acid is a key contributor to the stinging sensation.
Methanoic acid (formic acid) is responsible for the stinging pain from nettle hairs.
Applying a weak base, such as a solution of baking soda or rubbing the affected area with the leaves of docks (often found growing near nettles), can help neutralize the acid and relieve the pain.

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