Why is it chemically unsafe to store curd or pickle in a copper vessel?
Answer and explanation
Correct answer: Their acids can form harmful salts with copper
Curd contains lactic acid, and pickles commonly contain acids such as acetic acid or citric acid. The governing principle is that acids can react with reactive metals, including copper, especially during prolonged contact. Such reactions may form soluble copper compounds that contaminate food and can be harmful in excess. Therefore option A is correct; the other options deny acidity or describe impossible transformations.
Frequently asked questions
What is the correct answer to this question?
Their acids can form harmful salts with copper
Why is this the correct answer?
Curd contains lactic acid, and pickles commonly contain acids such as acetic acid or citric acid. The governing principle is that acids can react with reactive metals, including copper, especially during prolonged contact. Such reactions may form soluble copper compounds that contaminate food and can be harmful in excess. Therefore option A is correct; the other options deny acidity or describe impossible transformations.
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.
