Question

what happens when copper vessel is exposed to moist air for long time? state wheather the corroded coating of copper acidic or basic

Answer 1

→when copper vessel is exposed to moist air for long time , it acquire a greenish layer called copper carbonate.

→ why greenish layer?

→ copper when exposed to moist air, the chemical reaction thus takes place causing greenish layer

→copper carbonate(Cu2CO3) is basic in nature

Answer 2

when copper vessel. is exposed to the moist air for long time it will become corrode because copper react with the chlorine presnt in the atmosphere and became greenish in colour and the corroded coating of copper is acidic