Question

What happens to oxygen gas in the air during burning?

Answer 1

It is chemically transformed to give `CO_2` or some other oxide......

Explanation:

And were we to burn methane, i.e. natural gas.....

`CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(l) + Delta`

The dioxygen molecule, `stackrel(0)O_2`, is REDUCED to give `stackrel(-II)O`; and carbon has been oxidized from `stackrel(-IV)C`, is OXIDIZED to give `stackrel(+IV)C`.