What risk may occur when curd is stored in a copper vessel?
Answer and explanation
Correct answer: Acids may react with copper and form harmful salts
The relevant concept is the reaction of food acids with reactive metals. Curd contains lactic acid and is therefore acidic. During prolonged contact, acids can react with copper, allowing copper compounds or salts to form and possibly contaminate the food. Excess copper intake can be harmful, so acidic foods are not safely stored in copper or brass vessels unless properly lined. The claims that curd becomes sweet, becomes water, or cannot react are false; hence A is correct.
Frequently asked questions
What is the correct answer to this question?
Acids may react with copper and form harmful salts
Why is this the correct answer?
The relevant concept is the reaction of food acids with reactive metals. Curd contains lactic acid and is therefore acidic. During prolonged contact, acids can react with copper, allowing copper compounds or salts to form and possibly contaminate the food. Excess copper intake can be harmful, so acidic foods are not safely stored in copper or brass vessels unless properly lined. The claims that curd becomes sweet, becomes water, or cannot react are false; hence 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.
