Question

Why should curd and sour substances not be kept in brass and copper vessel?
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Answer 1

Curd and sour substances should not kept in copper and brass vessels because they contain acid which can react with metals and form salts.

Answer 2

Answer:

Curd is acidic in nature and brass and copper are metals which are basic in nature. When curd is stored in brass vessels, harmful salts are deposited in the curd and when consumed, it can be dangerous.