Question:
The following reaction takes place when aluminium powder is heated with Mn02.
$3 \mathrm{MnO}_{2}(s)+4 \mathrm{Al}(s) \longrightarrow 3 \mathrm{Mn}(s)+2 \mathrm{Al}_{2} \mathrm{O}_{3}(s)+$ Heat
(a) Is aluminium getting reduced ?
(b) Is Mn02 getting oxidised ?
Solution:
(a) Aluminium is getting oxidised to Al2O3.
(b) Manganese dioxide is getting reduced to Mn.