Consider the following statements in the extraction of iron from haematite:
(I) `CO`is the main reducing agent
(II) `Fe_(2)O_(3)`is used to oxidise the impurities be Bessemer process
(III) In basic oxygen process, air is used to oxidise the impurities.
(IV) When air is used to oxidise the impurities, iron nitride is formed in iron
Pick the correct set of statement `(s)`:

Pure O_(2) instead of air is used to oxidise the pig iron because:

Pure O_(2) instead of air is used to oxidise the pig iron because:

When impurity of Fe_2O_3 is excess then the process used in concentration of bauxite is

Consider the following statements : S_(1) : In extration of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace. S_(2) : Calamine in an carbonate ore of zince. S_(3) : The principle ore of aluminium , bauxite , usually contains silica, iron oxides and titanium oxide as impurities. S_(4) : Solidified copper obtained from silica lined conventor ( Bessemer converter ) has blistered appearance due to the evolution of SO_(2) . Which are correct statements?

Consider the following statements : S_(1) : In extration of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace. S_(2) : Calamine in an carbonate ore of zince. S_(3) : The principle ore of aluminium , bauxite , usually contains silica, iron oxides and titanium oxide as impurities. S_(4) : Solidified copper obtained from silica lined conventor ( Bessemer converter ) has blistered appearance due to the evolution of SO_(2) . and arrange in the order of true // false.

The purest form of iron is prepared by oxidising the impurities present in cast iron in a reverberatory furnace. What type of iron is used for lining inside the furnace ? Explain with equation.

Complete the following statements using proper words: In a thermite mixture, aluminium ____________ (oxidises/reduces) iron (III)oxide.

Calcium silicate (slag) formed in the slag formation zone is extraction of iron from haematite ore I. does not dissolve in molten iron II. being lighter floats on the moltern iron III. Is used in cement industry IV. prevents the re-oxidation of molten iron