100 tons of `Fe_(2)O_(3)` containing 20% impurities will give iron by reduction with `H_(2)` equal to

200 tons of Fe_2O_3 containing 40% imurities will give iron by reduction with H_2 equal to :

Pig iron is obtained by reduction of Fe_2O_3 -

One mole mixture of FeO and Fe_(3)O_(4) containing equal moles of each on reaction with excess O_(2) gives n moles of Fe_(2)O_(3).n is:

In Fe_(2)O_(3) , the combining power of iron is 2 and that of oxygen is 3.

Iron is obtained on a large scale by reduction of Fe_(2)O_3 with :

In the extraction of iron, Fe_(2)O_(3) is reduced with -

Number of atoms of iron present in 100 gm Fe_(2)O_(3) having 20% purity is

Number of atoms of iron present in 100 gm Fe_(2)O_(3) having 20% purity is