Question

why should curd and sour substances not be kept in brass and copper vessels​

Answer 1

Answer:

Curd and sour substances contain acids. So, if such substances are kept in copper container, the acid will react and the container will be corroded.

Explanation:

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Answer 2

Answer:

BTS

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Curd and sour substances should not be kept in brass and copper vessels because these and other sour food-stuffs contain acids which can react with the metal of the vessel to form poisonous metal compounds which can cause food poisoning and affect our health adversely.