What is the correct scientific reason for avoiding storage of curd in copper or brass vessels?
Answer and explanation
Correct answer: Acids in curd can react with metal and form harmful salts
The governing concept is the reaction of acids with certain metals. Curd contains lactic acid and is therefore acidic. If it is stored for some time in copper or brass, the acid may react with the metal surface and produce metal compounds or salts that can contaminate the food. Hence option A gives the correct safety reason. Gold formation is impossible here, copper does not always destroy acids, and the claim that curd has no acid is false.
Frequently asked questions
What is the correct answer to this question?
Acids in curd can react with metal and form harmful salts
Why is this the correct answer?
The governing concept is the reaction of acids with certain metals. Curd contains lactic acid and is therefore acidic. If it is stored for some time in copper or brass, the acid may react with the metal surface and produce metal compounds or salts that can contaminate the food. Hence option A gives the correct safety reason. Gold formation is impossible here, copper does not always destroy acids, and the claim that curd has no acid is false.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
