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Electrometallurgy

69. In the lo...

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69. In the lower temperature range of blast furnace {Fe_2O_3 first reduced to { (1) Fe_3O_4{ (2) FeO (3) Fe (4) Mixture of Fe and Feo

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Q. The reducing agent used in the blast furnace to reduce

F e_{2} O_{3}

Q. A mixture of

F e O

{F e}_{3} O_{4}

heated in air to a constant weight gains

5

% in its weight. The percentage contribution of

F e O

in the mixture is:

What is the empirical formula of Fe₂O₃?

Q. Among the reactions (A) - (D), the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are:

(A) C a O + S i O_{2} \to C a S i O_{3}

(B) 3 F e_{2} O_{3} + C O \to 2 F e_{3} O_{4} + C O_{2}

(C) F e O + S i O_{2} \to F e S i O_{3}

(D) F e O \to F e + \frac{1}{2} O_{2}

Q. 520 gm mixture of

{F e}_{2} O_{3}

and FeO reacts completely with 158 gm

K M n O_{4}

in acidic medium. Calculate the mole % of

{F e}_{2} O_{3}

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