1.

Why do copper vessel turn green with the passage of time?

Answer» HEY FriENd HeRe is YoUR AnsWEr :-
It turns green due to chemical reaction with elements. As when we left it UNPROTECTED in the open air then it start reacting MAKING a pale green colour layer called PATINA.
## HoPe mY anSwEr wILL heLp yOu ##


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