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BITSAT 2023Paper 1

Exam: BITSAT
Year: 2023
Paper: Paper 1
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

BITSAT 2023 · Paper 1 · Chemistry · General Principles and Processes of Isolation of Metals

The reaction that does NOT take place in a blast furnace between...

The reaction that does NOT take place in a blast furnace between

900 \mathrm{ K}

to

1500 \mathrm{ K}

temperature range during extraction of iron is :

Options

A $\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \rightarrow 2 \mathrm{FeO}+\mathrm{CO}_2$
B $\mathrm{FeO}+\mathrm{CO} \rightarrow \mathrm{Fe}+\mathrm{CO}_2$
C $\mathrm{C}+\mathrm{CO}_2 \rightarrow 2 \mathrm{CO}$
D $\mathrm{CaO}+\mathrm{SiO}_2 \rightarrow \mathrm{CaSiO}_3$

Correct answer

A. $\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \rightarrow 2 \mathrm{FeO}+\mathrm{CO}_2$

Step-by-step solution

At

900-1500 \mathrm{ K}

(higher temperature range in the blast furnace)
Reaction which take place are:

\mathrm{C}+\mathrm{CO}_2 \longrightarrow 2 \mathrm{CO}

\mathrm{FeO}+\mathrm{CO} \longrightarrow \mathrm{Fe}+\mathrm{CO}_2

\mathrm{CaO}+\mathrm{SiO}_2 \longrightarrow \mathrm{CaSiO}_3

(Slag formation)

\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{FeO}+\mathrm{CO}_2

at

500-800 \mathrm{ K}

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