Verified Solution • 2025–26 Session moderate

QJEEAdv22Ch1903: JEE Advanced 2022 Chemistry - Class 12 JEEAdv22Ch1903 Solution: The correct option(s) related to the extraction of iron from…

The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range 900−1500 K900-1500 \mathrm{~K} is(are)

Multiple Choice Options

  • A Limestone is used to remove silicate impurity.
  • B Pig iron obtained from blast furnace contains about 4%4 \% carbon.
  • C Coke (C) converts CO2\mathrm{CO}_{2} to CO\mathrm{CO} .
  • D Exhaust gases consist of NO2\mathrm{NO}_{2} and CO\mathrm{CO} .

Step-by-Step Verified Solution

(A) Limestone is added to remove silica as impurity.

(B) Pig iron obtained from blast furnace contains 4% carbon and many other impurities (eg. S, P, Si, Mn) in small amount.

(C) Coke (C) converts CO2\mathrm{CO}_2 in CO\mathrm{CO} .

C+CO2→2CO\mathrm{C}+\mathrm{CO}_2 \rightarrow 2 \mathrm{CO}

(D) Exhaust gases consist of CO\mathrm{CO} and CO2\mathrm{CO}_2 .

Hence, (A, B, C) are correct.

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