Which of the following contain maleic acid?
Correct answer: C. Apple
- A. Milk
- B. Grape
- C. Apple
- D. Lemon
Explanation
The correct answer is Apple. Apples contain maleic acid, which is responsible for their tartness. Maleic acid is less common in other foods listed, like milk, grapes, and lemons. Milk contains lactic acid, grapes contain tartaric acid, and lemons are known for their citric acid content.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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