Single correct option
The acid present in vinegar is
- A. citric acid
- B. ethanoic acid (acetic acid)
- C. lactic acid
- D. formic acid
Show answer and solution
Answer: (B) ethanoic acid (acetic acid)
Vinegar is a dilute solution, about 5 to 8 percent, of ethanoic acid, CH₃COOH, made by fermentation of sugar or alcohol. Citric acid is found in lemon and orange, lactic acid in sour milk and curd, and formic acid in ant and nettle stings. Each is a common household link and a typical trap.
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