Question

Tomato is a natural source of _ _ _ acid.

• A. Acetic acid
• B. Citric acid
• C. Tartaric acid
• D. Oxalic acid

Hint:

While tomatoes contain small amounts of citric and malic acids, they are uniquely notable for their high content of Oxalic acid. Individuals prone to kidney stones (calcium oxalate) are often advised to regulate their intake of tomato seeds and spinach because of this.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Many naturally occurring fruits and vegetables contain organic acids that contribute to their unique taste, metabolic processes, and nutritional profile.

Step 2: Key Formula or Approach:
Match the primary natural organic acids with their common dietary sources:
- Acetic acid is found in vinegar.
- Citric acid is prevalent in citrus fruits like lemons and oranges.
- Tartaric acid is found in tamarind and grapes.
- Oxalic acid is found in high concentrations in tomatoes and spinach.

Step 3: Detailed Explanation:
Tomatoes contain multiple organic acids, including citric acid, malic acid, and oxalic acid.
However, in standard academic curricula and chemistry assessments, tomatoes are primarily recognized and highlighted as a classic natural source of oxalic acid ($HOOC-COOH$).
Therefore, option (D) is the most appropriate choice.

Step 4: Final Answer:
Tomato is a natural source of Oxalic acid.