Which reaction from following occurs at $2000 \mathrm{~K}$ in the blast furnace for extraction of iron?

Which reaction from following occurs at $2000 \mathrm{~K}$ in the blast furnace for extraction of iron?
  1. $\mathrm{CaO}+\mathrm{SiO}_{2} \longrightarrow \mathrm{CaSiO}_{3}$
  2. $\mathrm{CaCO}_{3} \longrightarrow \mathrm{CaO}+\mathrm{CO}_{2}$
  3. $\mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{CO} \longrightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_{2}$
  4. $2 \mathrm{C}+\mathrm{O}_{2} \longrightarrow 2 \mathrm{CO}$

Solution

At bottom of furnace, 2000°K occurs, and here Carbon reacts with oxygen to give Carbon mono oxide

Asked in: MHT CET 2020 (15 Oct Shift 1)

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