Question

what happens when copper article remain expose to air for a considerable time,?give reaction involved​

Answer 1

When copper is exposed to air it corrodes and forms a green layer which sticks onto it and prevents it from further corrosion.

2Cu+H2O+O2+CO2 ------------- Cu(OH)2 . CuCo3

Explanation:

Answer 2

Answer:

Explanation:

When copper II articles are exposed to air for a long period of time , they get curoded due to the action of environmental oxugen to form copper oxide this then reacts with carbon dioxide in the environment to give copper carbonate

Skeletal eq Cu + CO2 --- CuO

Skeletal ea. CuO +CO2 --- CuCO3

This gives it it's green colour

Considering most are mainly made of copper II ask if any doubts