Question

why should curd and sour substances not be kept in brass and copper vessels​

Answer 1

Answer:

when kept in copper or brass vessels,curd(and other acidic food items) reacts with copper and forms toxic compounds which may be unfit for human consumption,and may cause food poisoning.thus it is not advisable to keep curd and other acidic or sour food items in copper or brass vessels.

Mark as brianiest answer

Answer 2

Curd and sour things are should not be kept in copper and brass vessels as due to the acidic nature of any sour thing make a poisonous substance on reacting with metals which can affect the health.