1. CaO + SiO ₂ → CaSiO ₃ 2. Fe ₂ O ₃ + CO → 2FeO + CO ₂ 3. FeO + CO → Fe + CO ₂ 4. C + CO ₂ → 2CO

Answer: 2. Fe ₂ O ₃ + CO → 2FeO + CO ₂ Key idea: The blast furnace has temperature zones: the reduction of Fe₂O₃ to FeO by CO takes place in the cooler zone, 500-800 K. In the 900-1500 K zone: FeO + CO → Fe + CO₂ , C + CO₂ → 2CO , and slag formation CaO + SiO₂ → CaSiO₃ occur. The step Fe₂O₃ + CO → 2FeO + CO₂ belongs to the lower zone, so option 2 is the answer.

Topic: Transition elements: configuration, occurrence and characteristics· d- and f-Block Elements

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

1. CaO + SiO\(_2\) \(\rightarrow\) CaSiO\(_3\)

2. Fe\(_2\)O\(_3\) + CO \(\rightarrow\) 2FeO + CO\(_2\)

3. FeO + CO \(\rightarrow\) Fe + CO\(_2\)

4. C + CO\(_2\) \(\rightarrow\) 2CO

Doubtly Asked 30 Oct 2026 NEET UG 2023 neet Save WhatsApp Report

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Answer: 2. Fe\(_2\)O\(_3\) + CO \(\rightarrow\) 2FeO + CO\(_2\)

Key idea: The blast furnace has temperature zones: the reduction of \(\mathrm{Fe_2O_3}\) to FeO by CO takes place in the cooler zone, 500-800 K.

In the 900-1500 K zone: \(\mathrm{FeO + CO \rightarrow Fe + CO_2}\), \(\mathrm{C + CO_2 \rightarrow 2CO}\), and slag formation \(\mathrm{CaO + SiO_2 \rightarrow CaSiO_3}\) occur. The step \(\mathrm{Fe_2O_3 + CO \rightarrow 2FeO + CO_2}\) belongs to the lower zone, so option 2 is the answer.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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

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