Correct Answer - Option 2 : Oxalic acid
Oxalic acid is a chemical compound that occurs naturally in almost every plant to some degree, including fruit, vegetable and grain plants.
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Tomato contains more than 10 types of acids such as citric acid, malic acid, ascorbic acid, and oxalic acid etc.
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Oxalic acid content of tomatoes is about 50 mg per 100 g serving.
Some natural sources of acid:
| Natural Source |
Acid |
| Vinegar |
Acetic acid |
| Orange |
Citric acid |
| Tamarind |
Tartaric acid |
| Sour milk (Curd) |
Lactic acid |
| Lemon |
Citric acid |
| Ant sting |
Methanoic acid |
| Nettle sting |
Methanoic acid |
