Question

Give the reason for the following.
Highly reactive metal cannot be obtained from their oxides by heating them with carbon.

Answer 1

The high reactive metals such as $K,Na,Ca$ and $Al$ are placed up in the reactivity series.

The oxides of high reactive metals are very stable and cannot be reduced by carbon . Because metals have more affinity towards oxygen than carbon.so carbon is unable to remove oxygen from these metals oxides and convert them into free metals.