Easy
The order of stability of metal oxides is:
- A$Fe_{2}O_{3} < Cr_{2}O_{3} < Al_{2}O_{3} < MgO$
- B$Cr_{2}O_{3} < MgO < Al_{2}O_{3} < Fe_{2}O_{3}$
- C$MgO < Al_{2}O_{3} < Cr_{2}O_{3} < Fe_{2}O_{3}$
- D$Fe_{2}O_{3} < Al_{2}O_{3} < Cr_{2}O_{3} < MgO$
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What is the slag formed in the extraction of iron?
In which of the following pairs of metals are both commercially extracted from their respective ores by the carbon reduction method?
Difficult
View SolutionWhich of the following has maximum iron content?
MediumAIIMS 2019
View SolutionThe Hall-Heroult process is represented by which of the following reactions?
The reactions which occur in a blast furnace at $500-800 \ K$ during the extraction of iron from haematite are:
$(i)$ $3 Fe_2O_3 + CO \rightarrow 2 Fe_3O_4 + CO_2$
$(ii)$ $Fe_2O_3 + 3 C \rightarrow 2 Fe + 3 CO$
$(iii)$ $Fe_3O_4 + 4 CO \rightarrow 3 Fe + 4 CO_2$
$(iv)$ $Fe_2O_3 + CO \rightarrow 2 FeO + CO_2$
$(i)$ $3 Fe_2O_3 + CO \rightarrow 2 Fe_3O_4 + CO_2$
$(ii)$ $Fe_2O_3 + 3 C \rightarrow 2 Fe + 3 CO$
$(iii)$ $Fe_3O_4 + 4 CO \rightarrow 3 Fe + 4 CO_2$
$(iv)$ $Fe_2O_3 + CO \rightarrow 2 FeO + CO_2$
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