When is electrolytic reduction applied for getting metal?

What is electrolytic cell?

An electrolyte.

What name is given to carbon reduction process for extracting the metal?

What chemical principle is involved in choosing a reducing agent for getting the metal from its oxide ore? Consider the metal oxide Al_2O_3 and Fe_2O_3 and Justifuy the choice of the reducing agent.

Why is the reduction of a metal oxide easier if the metal formed is in the liquid state at the temperature of reduction?

When the zinc electrode having electrode reduction potential -0.76V is attached to NHE, will it acts as anode or cathode?

A blackish brown coloured solid 'A' when fused with alkali metal hydroxides in presence of air, produces a dark green coloured compound 'B' which on electrolytic oxidation in alkaline medium gives a dark purple coloured compound 'C' Identify A, B and C and write the reactions involved.