Tomato is a Natural Source of Which Acid? (a) Acetic Acid (b) Citric Acid (c) Tartaric Acid (d) Oxalic

Answer: (d) Oxalic acid

Explanation: 

• Oxalic acid is found in many green and leafy vegetables, fruits, nuts, cocoa and seeds.
• It is an organic compound.
• Tomato is the most natural source of oxalic acid.
• In the natural form, it is attached to some minerals and exists in the form of oxalate in plants.
• Chemical formula: (COOH)2.
• For acetic acid the natural source is vinegar.
• For citric acid, the natural source is Lemon.
• For Tartaric acid, Grapes and bananas are very rich sources.