Question

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

Answer 1

because curd and sour substance contain acid in them and acid can react with brass and copper vessel and make it toxic and harmful substance

Answer 2

Hey friend here is your answer

Curd or other sour substances are mildly acidic . They contain acid like curd contains lactic acid . And brass and copper are metals .

So if curd is stored in them , then the acid can react with the metal and produce poisonous substances .

Hope it helps you
Pls mark brainliest