In the electrolytic extraction of $Al$,molten cryolite $(Na_3AlF_6)$ is used because it .......

Although carbon and hydrogen are better reducing agents,they are not used to reduce metallic oxides at high temperatures. Why?

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

Which is the most impure form of iron?

The Ellingham diagram for zinc,magnesium and carbon converting into corresponding oxides is shown below.
At $........$ $^oC$ temperature,zinc and carbon have equal affinity for oxygen.

Chemical reduction is not suitable for converting