In the alumino-thermite process,aluminium is used as:

Which method is used to obtain $Al$ from $Al_2O_3$?

The reactions which occur in a blast furnace at $500-800 \ K$ during the extraction of iron from haematite are:
$(i)$ $3 Fe_2O_3 + CO \rightarrow 2 Fe_3O_4 + CO_2$
$(ii)$ $Fe_2O_3 + 3 C \rightarrow 2 Fe + 3 CO$
$(iii)$ $Fe_3O_4 + 4 CO \rightarrow 3 Fe + 4 CO_2$
$(iv)$ $Fe_2O_3 + CO \rightarrow 2 FeO + CO_2$

In the extraction of copper,when molten copper is cooled slowly,blister copper is obtained due to the evolution of which of the following gases?

Explain the reduction process involved in the extraction of zinc.

What is the role of cryolite in the metallurgy of aluminium?