Why is storing curd in a copper vessel not considered safe?
Answer and explanation
Correct answer: Acids in curd can react with copper
The governing concept is the reaction of acids with metals. Curd contains lactic acid and is therefore acidic. On prolonged contact, the acid may react with copper and form copper compounds or salts that can contaminate the food and make it unsafe. Hence option A is correct. Option C is false because curd does contain acid, while B and D describe changes that have no chemical basis in this situation.
Frequently asked questions
What is the correct answer to this question?
Acids in curd can react with copper
Why is this the correct answer?
The governing concept is the reaction of acids with metals. Curd contains lactic acid and is therefore acidic. On prolonged contact, the acid may react with copper and form copper compounds or salts that can contaminate the food and make it unsafe. Hence option A is correct. Option C is false because curd does contain acid, while B and D describe changes that have no chemical basis in this situation.
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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