Which of the following acids is present in the stinging nettles?

This question was previously asked in
RRB JE 29 May 2019 (Shift 2) CBT 1 Official Paper
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  1. Formic acid 
  2. Lactic acid
  3. Tartaric acid
  4. Citric acid

Answer (Detailed Solution Below)

Option 1 : Formic acid 
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Detailed Solution

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The correct answer is Formic acid

Key Points

  • Formic acid is the acid present in the stinging nettles.
  • Stinging nettles, when touched, release this acid, causing a stinging sensation on the skin.
  • Formic acid is also found in the venom of ants and bees.
  • It is a simple carboxylic acid with the chemical formula HCOOH.
  • Formic acid is used in various industrial applications, including as a preservative and antibacterial agent.

Additional Information

  • Stinging nettles are plants that belong to the genus Urtica.
  • The stinging sensation is caused by tiny hairs on the leaves and stems that inject formic acid and other chemicals into the skin.
  • Despite their sting, nettles are used in traditional medicine and can be consumed as a nutrient-rich food after proper preparation.
  • Formic acid was first isolated by the distillation of ant bodies, hence its name derived from the Latin word for ant, "formica".
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