Question

Why carbon cannot be used as reducing agent to obtain Al from its oxide ?

Answer 1

Highly reactive metals like aluminium, potassium, sodium etc. need great effunity for oxygen they cannot be reduced with the help of carbon.

Answer 2

Carbon cannot be used as reducing agent to obtain Al from its oxide because Al is more reactive than carbon .

So, carbon cannot displace Al from its oxide . Hence, carbon cannot be used as a reducing agent for obtaining Al from its oxide.

:-) hope you understand