Chemistry · Thermodynamics & Thermochemistry

NEET (UG) 2023 — Question 182

The reaction that does NOT take place in a blast furnace between 900 K to 1500 K temperature range during extraction of iron is :

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

Answer: D

At 900-1500 K (higher temperature range in the blast furnace)

Reaction which take place are :- $\mathrm{C}+\mathrm{CO}_2 \rightarrow 2 \mathrm{CO}$

$\mathrm{FeO}+\mathrm{CO} \rightarrow \mathrm{Fe}+\mathrm{CO}_2$ $\mathrm{CaO}+\mathrm{SiO}_2 \rightarrow \mathrm{CaSiO}_3$ (Slag formation)

$\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \rightarrow 2 \mathrm{FeO}+\mathrm{CO}_2 \rightarrow$ This take place at $500-800 \mathrm{~K}$ .

Answer key and solution verified before publishing.

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Exam: NEET (UG) 2023
Paper: 2023 paper
Subject: Chemistry
Chapter: Thermodynamics & Thermochemistry
Topic: Gibbs Free Energy - Relation with Equilibrium, Metallurgy and Electrochemistry