Question

Na + O2 give Na2O which is odised and reduced substance

Answer 1

Na is oxidised
O2 is reduced

Answer 2

Hi

Here devil1407

Na is oxidised because each Na gives electron to oxygen and get oxidised.

O2 is reduced because it gets electron from Na and get reduced.

Always......#Metals get oxidised(reducing agent).
                  #Nonmetals get reduced(oxidising agent).

Hope it helps u

Thanx.....Bye