In the aluminothermite process,aluminium acts as:

The main reactions occurring in a blast furnace during the extraction of iron from haematite are $....$.
$(i)$ $Fe_2O_3 + 3CO \to 2Fe + 3CO_2$
$(ii)$ $FeO + SiO_2 \to FeSiO_3$
$(iii)$ $Fe_2O_3 + 3C \to 2Fe + 3CO$
$(iv)$ $CaO + SiO_2 \to CaSiO_3$

Explain the use of physico-chemical principles in metallurgy.

The metal extracted by the electrolysis of its fused salt is

In the alumino-thermite process,$Al$ metal acts as

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