Multiple choice

Vinegar is obtained from the fermentation of ethanol. Its key ingredient is

  1. abietic acid

  2. paracetamol

  3. acetone

  4. acetic acid

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acetic acid is a colourless liquid that when undiluted is also called glacial acetic acid. As the main component of vinegar, it has a distinctive sour taste and pungent smell. Although it is classified as a weak acid, acetic acid is highly dangerous to skin.