Question

Why is it not advisable to keep curd in copper brass vessels?

Answer 1

because curd and other sour food items contain acid which reacts with metal of the vessel to produce poisonous metal compound and causes food poisoning which can be dangerous for our health

Answer 2

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