Methanoic acid is normally found in :

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muscles

urine

ant stings

human brain

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This question was previously asked in

UPSC CDS-1 – 2022

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Methanoic acid (formic acid, HCOOH) is notably found in the venom of ants and in the stinging hairs of nettles. It is injected when an ant bites or when contact is made with a nettle, causing pain and irritation.

Methanoic acid is the simplest carboxylic acid. Its historical name, formic acid, comes from the Latin word “formica,” meaning ant, due to its initial isolation from ants.

Lactic acid is found in muscles (formed during anaerobic respiration). Urine contains urea and other waste products. The human brain contains various complex organic molecules, including neurotransmitters and lipids, but methanoic acid is not a primary constituent.

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