Question

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

Answer 1

Curds reacts with the brass and copper in the vessel to produce poisonous substances.
These substances can cause food poisoning which in turn can prove to be fatal.
Hence, Curd is not kept or stored in a copper or brass vessel.

Answer 2

Hey mate here is your answer

when curd is kept in these metals, it reacts with copper and forms toxic substances which is not suitable to consume and can also cause food poisoning.

Hope it helps you
Thank you