What chemical risk can occur by storing curd in a copper vessel?
Answer and explanation
Correct answer: Acids can react with copper and form harmful salts
The governing concept is the reaction of acidic food with a reactive metal surface. Curd contains lactic acid and is therefore acidic. If it is stored for a long time in a copper vessel, the acid may react with copper and form copper compounds or salts that can contaminate the food. This is why acidic foods are not normally stored in copper or brass vessels. Hence option A is correct; curd is not acid-free and copper is not universally safe.
Frequently asked questions
What is the correct answer to this question?
Acids can react with copper and form harmful salts
Why is this the correct answer?
The governing concept is the reaction of acidic food with a reactive metal surface. Curd contains lactic acid and is therefore acidic. If it is stored for a long time in a copper vessel, the acid may react with copper and form copper compounds or salts that can contaminate the food. This is why acidic foods are not normally stored in copper or brass vessels. Hence option A is correct; curd is not acid-free and copper is not universally safe.
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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