Question

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

Answer:

brass and copper are reactive to these

so we need to store in plastic, because plastic had the property of non-reactive

Explanation:

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Answer 2

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Curd and Sour substances should not be kept in brass and copper vessels beacuse both the Curd and sour substances are acids. Acids react with metals to produce salt and hydrogen gas.