What is the IUPAC name for acetic acid?

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RRB JE CBT I - (Held On: 2 June 2019 Shift 1)
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  1. Butanoic acid
  2. Ethanoic acid
  3. Propanoic acid
  4. Methanoic acid

Answer (Detailed Solution Below)

Option 2 : Ethanoic acid
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The correct answer is Ethanoic acid

Key Points

  • Ethanoic acid is the IUPAC name for acetic acid.
  • Acetic acid is a simple carboxylic acid with the chemical formula CH3COOH.
  • It is commonly found in vinegar, which contains about 4-8% acetic acid by volume.
  • Ethanoic acid is used in various industrial processes, including the production of synthetic fibers and plastics.
  • It is a colorless liquid with a strong, pungent smell and a sour taste.

Additional Information

  • The name "acetic acid" is derived from the Latin word "acetum," which means vinegar.
  • Ethanoic acid is a key component of the metabolic pathway known as the citric acid cycle (Krebs cycle).
  • In the citric acid cycle, it plays a crucial role in the biochemical generation of energy in living organisms.
  • The acid dissociation constant (pKa) of ethanoic acid is 4.76, indicating it is a weak acid.
  • It can be produced both synthetically and by bacterial fermentation.
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