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Question

Which of the following statements are correct regarding metallurgy of iron?

A
Coke reduces FeO to Fe above 710C
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B
CO reduces Fe2O3 to Fe below 710C
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C
Coke reduces Fe2O3 to FeO below 710C
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D
CO reduces Fe2O3 to FeO above 710C
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Solution

The correct options are
B Coke reduces FeO to Fe above 710C
C CO reduces Fe2O3 to Fe below 710C
Coke reduces FeO to Fe above 710 C.
FeO+CFe+CO

In the blast furnace, it is so hot that carbon monoxide can be used to reduce the iron oxide in place of carbon at below 710 C.

Fe2O3+3CO2Fe+3CO2

Hence options A & B are correct.

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