Question

Why should curd and sour substance s not be kept in brass and copper

Answer 1

$<i> Curd and other sour substances contain acids. Therefore, when they are kept in brass and copper vessels, the metal reacts with the acid to liberate hydrogen gas and harmful products, thereby spoiling the food.$

Answer 2

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

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Curd and sour substances are acidic in nature. The acid present in curd and sour substances react with metal surface of brass and copper vessels to produce toxic compounds which are not fit for consumption. Thus, curd and sour substances should not be kept in brass and copper vessels.