Which of the following is/are the natural source of methanoic acid?

Both Option 2 and Option 3 are correct

The correct answer is option 4. Both Option 2 and Option 3 are correct.

Methanoic acid, also known as formic acid, is a naturally occurring compound found in various sources in nature. It is a simple carboxylic acid with the chemical formula \(HCOOH\).

Ant Sting: Many species of ants, including fire ants, produce venom that contains methanoic acid. When these ants bite or sting, they inject this venom into their prey or victims. Methanoic acid is one of the main components of ant venom and is responsible for the burning sensation and irritation experienced upon ant stings.

Nettle Sting: Stinging nettles are plants that possess tiny hairs called trichomes on their leaves and stems. These trichomes contain chemicals, including formic acid (methanoic acid), which are released when the plant comes into contact with skin. Formic acid causes a stinging sensation, redness, and irritation on the skin, known as nettle sting.

Both ant stings and nettle stings involve the release of methanoic acid, causing irritation and discomfort upon contact with the skin. These natural sources of methanoic acid serve defensive purposes for ants and plants, deterring predators and protecting themselves from harm.