Question

why should curd and sour substance no be kept in brass and copper vessels

Answer 1

curd and sour substances should not be kept in copper and brass vessels because these metals react with sour substances or acids. because of this property acids are also used for cleaning them

Answer 2

curd and sour substances should not be kept in copper and brass vessels because these metals react with sour substances or acids. copper is more over highly reactive and thus it can make the items unhygenic and unhealthy