Which acid is naturally present in lemons and oranges, giving them a sour taste?

💡 Solution & Explanation

Citric acid is an organic acid found in high concentrations in citrus fruits such as lemons, limes, and oranges. Acetic acid is found in vinegar, lactic acid in sour milk and muscles, and formic acid in ant stings. Citric acid acts as a natural preservative and flavoring agent in food industries.