Question

The following reaction takes place when aluminium powder is heated with MnO₂.

3MnO₂(s) + 4Al(s) ------> 3Mn(/) + 2Al₂O₃(t) + Heat

(a) Is aluminium getting reduced?
(b) Is MnO₂ getting oxidised?

Answer 1

(a) No, because oxygen is added to aluminium, therefore, it is getting oxidised.
(b) No, since manganese has lost oxygen, therefore, it is getting reduced.