A) reduction
B) oxidation
C) reduction followed by oxidation
D) oxidation followed by reduction
Correct Answer: A
Solution :
Haematite ore contain \[F{{e}_{2}}{{O}_{3}}\] which is reduced by CO in the blast furnace as \[F{{e}_{2}}{{O}_{3}}+CO\to Fe+C{{O}_{2}}\]
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