Question

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

vessels?

Answer 1

Because, curd and sour substances have micro organisms and they react with brass or copper vessel due to this they become spoil and may be harmful for our body.

Answer 2

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