Answer the following question:
A metal 'M' does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify 'M' and black coloured product and also explain the reaction of 'M' with oxygen.
i. The metal 'M' is .
ii. When the metal 'M' reacts with oxygen, it undergoes a chemical reaction known as . In this reaction, the metal 'M' combines with oxygen to form , which is a black-coloured compound.
The chemical equation for the reaction is .