Which Acid is Present in Ant Sting(A) Butanoic acid (B) Acetic acid (C) Methanoic acid (D) Ethanoic acid

Answer: (C) Methanoic acid 

Ants produce Methanoic acid or formic acid. HCOOH is the chemical formula for Methanoic acid. 

Rubbing baking soda on the ant sting can provide relief from the burning sensation caused by the Methanoic acid. 

Genus Formica wood ants spray Methanoic acid on their prey and to defend their nest. The acid has become a naturally occurring element in the atmosphere due to forest emissions. 

Methanoic acid is a colourless liquid acid having a pungent odour. The puss moth caterpillar also sprays this acid when attacked by predators. The acid is used as a preservative and an antibacterial agent for livestock feed.