Ncert Exercises & Solutions

The main reactions that occur in the blast furnace during iron extraction from hematite are:

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and d

HINT: Fe₂O₃ is first reduced to Fe₃O₄ and then to FeO

Explanation:

STEP 1:

In the extraction of iron from haematite ore following reactions take place.

(i)

{Fe}_{2} O_{3} + 3 CO \to 2 Fe + 3 {CO}_{2}

This reaction represents a reduction of

{Fe}_{2} O_{3}

Fe

(ii)

\underset{Formation of slag}{CaO + {SiO}_{2}} \to \underset{Slag}{{CaSiO}_{3}}

STEP 2:

The reactions are as follows: