What is the chemical formula of Methanoic acid?

Option 3 is correct, i.e. HCOOH.

Key Points

• The scientific name of HCOOH is formic acid.
• Formic acid is the other name of Methanoic acid.
• An acid is a compound that produces hydrogen ions when it dissolves in solution. The acidic property depends on the concentration of the Hydrogen ion in the solution.
• H+ ion cannot exist alone. It always conjugates with the water and forms hydronium ion(H³O+).
• If the concentration of H+ ion is more then it is called the Strong acid. Example: Hydrochloric acid(HCl), Sulphuric acid (H₂SO₄), Nitic acid(HNO₃), etc.
• It the concentration of H+ ion is less then it is called the weak acid. Example: Acetic acid(CH₃COOH), Carbonic acid(H₂CO₃), etc.