The maximum temperature $1550$ $^oC$ is obtained in the ......... region of the blast furnace used in the extraction of iron.

Thermite is a mixture of iron oxide and which of the following?

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

During the smelting of roasted copper ore,silica is added to remove:

Among the following groups of oxides,the group containing oxides that cannot be reduced by $C$ to give the respective metal is

Flux is used to remove