MCQ
What makes a lemon sour
  • A
    Tartaric acid
  • B
    Oxalic acid
  • Citric acid
  • D
    Hydrochloric acid

Answer

Correct option: C.
Citric acid
c
The juice of the lemon is about $5\,\%$ to $6\,\%$ citric acid, with a $pH$ of around $2.2$, giving it a sour taste.

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