Question

why the Butter milk spoil when ot put in Copper and Bronze vessel

Answer 1

Brass or copper container react with organic that is litric acid present in buttermilk and poisonious salt is formed .hence buttermilk spoils if kept in copper or bronze containers.

SORRY FOR SPELLING MISTAKES.

Answer 2

Buttermilk contains an organic compound called lactic acid. Copper and broze both are capable of reacting with lactic acid. When buttermilk is kept in either of copper or bronze container it undergoes chemical reaction forming toxic salts. This makes the buttermilk unfit for human consumption. People suffer from food poisoning on consuming it.