Why is there a risk of harmful substances forming when lemon juice is stored in a copper vessel?
Answer and explanation
Correct answer: Acid in lemon can react with copper
Lemon juice contains citric acid, so it is acidic rather than basic. Acids can react with metals under suitable conditions; prolonged contact may allow copper to dissolve slowly and form copper-containing salts or other contaminants. This is why acidic foods are not generally stored in unlined copper vessels. The claim that copper never reacts with acids is false, and the other alternatives describe impossible or irrelevant changes. Therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
Acid in lemon can react with copper
Why is this the correct answer?
Lemon juice contains citric acid, so it is acidic rather than basic. Acids can react with metals under suitable conditions; prolonged contact may allow copper to dissolve slowly and form copper-containing salts or other contaminants. This is why acidic foods are not generally stored in unlined copper vessels. The claim that copper never reacts with acids is false, and the other alternatives describe impossible or irrelevant changes. Therefore option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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