Question

Can anyone please solve this one : ​

Answer 1

this phenomenon is known as corrosion

black coating is silver sulphide

and green coating is copper carbonate

hope it helps

plz mark brainliest

buddy

Answer 2

It's because of corrosion ..

Silver articles become black when exposed to air

This is because it reacts with sulphur in the air to form a coating of silver sulphide

Copper reacts with moist carbon dioxide in air and slowly loses its shiny brown surface and gains a green coat . This green substance in copper carbonate