(a) `text(Ores)` : Haematite - `Fe_2O_3`, Limonite - `2Fe_2O_3*3H_2O`; Siderite - `FeCO_3`; Magnetite - `Fe_3O_4`, Pyrite- `FeS_2`

(b) `text(Process)` : See fig.1 and fig.2.

(c) `text(Reactions involved)` :

The overall process for the extraction of `Fe` is :

`3C + Fe_2O_3 -> 4Fe + 3CO_2`

`CaCO_3 + SiO_2 -> CaSiO_3 + CO_2`

The reaction proceeds in several stages at different temperatures. Since the air passes through in a few seconds. The individual reactions do not reach equilibrium.

`400^oC` `3Fe_2O_3 + CO -> 2Fe_3O_4 + CO_2`

`Fe_3O_4 + CO -> 2FeO + CO_2`

`500-600^oC` `2CO -> C + CO_2`

The `C` is deposited as soot and reduces `FeO` to `Fe` but it also reacts with the refractory lining of the furnace, and is harmful

`800^oC` `FeO + CO -> Fe + CO_2`

`900^oC` `CaCO_3 -> CaO + CO_2`

`1000^oC` `FeO + CO -> Fe + CO_2`

`CO_2 + C -> 2CO`

(Together these two reactions appear to be `FeO + C-> Fe + CO`)

`1800^oC` `CaO + SiO_2 -> CaSiO_3`

`FeS + CaO + C -> Fe + CaS + CO`

`MnO + C-> Mn_(text(in Fe)) + CO`

`SiO_2 + 2C -> Si_(text((in Fe)) + 2CO`

(d) `text(Pig Iron)` : `C approx 3.1 - 4.5` `%`, small amounts of `Si`, `S`, `P`; hard and brittle, obtained from blast furnace.

(e) `text(Wrought Iron)` : `C approx 0.15 - 0.28` `%`, purest form; malleable, fibrous.