Question

why pickles and sour substances are not stored in brass and copper vessels?

Answer 1

Thanks for asking the question.
Pickles and sour substances are acidic in nature and contain a high proportion of acids (in vinegar). Brass and copper vessels are reactive when it comes to acid. So if pickles and other sour substances are stored in brass and copper vessels, they react to give metal oxides and hydrogen gas as by product. These metal oxides are poisonous and harmful for human health.
Hope it helps. 

Answer 2

I HOPE THIS ANSWER WILL HELP YOU

we should not store pickles and sour substances in brass and copper vessels because when it contains acid in it and when acid reacts with metal it produces harmful and toxic salts.
THANK YOU