Question

Write the chemical equations for reaction taking place when manganese dioxide is heated with aluminium powder

Answer 1

3MnO2 + 4Al gives 3Mn+2Al2O3

Answer 2

Explanation:

It is known that aluminium is more reactive than manganese therefore, when manganese dioxide reacts with aluminium then it results into the formation of aluminium trioxide and manganese.

The chemical reaction will be as follows.

   $3MnO_{2} + 4Al \rightarrow 2Al_{2}O_{3} + 3Mn$

So, we can see that aluminium being stronger than manganese is able to displace manganese from manganese dioxide. This reaction is also known as single displacement reaction.