Copper becomes green when exposed to moist air for longer period because of the formation of a layer of

Copper becomes green when exposed to moist air for a long period. This is due to:

Why NO become brown when exposed in air?

Why copper becomes green if left open in air ?

Copper gets covered with green layer when exposed to air due to the formation of:

Ca on exposure in moist air forms a layer on surface of:

A metal 'P' when exposed to moist air for longer period of times, loses its shining brown surface and gains green coating, what has happened ? Identify the metal, write the name and chemical formula of green coloured compound. List two ways to prevent this process.

Explain why-(a) A green layeris formed on the surface of copper which is left exposed in moist air for a long period. (b) blue colour of the copper sulphate solution is discharged slowly when an iron rod is dipped in it. (c) Galvanised irono is not used as a fondstuff container.