A lemon is sour because of
-
citric acid
-
oxalic acid
-
acetic acid
-
None of these
A
Correct answer
Explanation
Lemons contain citric acid (C6H8O7), which gives them their characteristic sour taste. Citric acid is a natural preservative found in citrus fruits. Oxalic acid is in spinach (causes metallic taste), acetic acid is in vinegar. Citric acid is the correct answer.