Question
The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range 900 - 1500   K is(are)
JEE Advanced
Chemistry
General Principles and Processes of Isolation of Metals
2022
JEE Advanced 2022 (Paper 2)
JEE Advanced Chemistry Question (2022) — Solution
Options
- A. Limestone is used to remove silicate impurity.
- B. Pig iron obtained from blast furnace contains about 4 % carbon.
- C. Coke C converts CO 2 to CO .
- D. Exhaust gases consist of NO 2 and CO .
Answer
C. Coke C converts CO 2 to CO .
Step-by-step solution
(A) Limestone is added to remove silica as impurity. CaO   +   SiO 2   →   CaSiO 3   ( in   the   temperature   range   900   –   1500   K ) (B) Pig iron obtained from blast furnace contains 4 % carbon and many other impurities (eg. S , P , Si , Mn ) in small amount. In fusion zone molten iron becomes heavy by absorbing elemental impurities and produces Pig iron. (in the temperature range 900 – 1500 K) (C) Coke C converts CO 2 in CO . C + CO 2 → 2 CO (D) Exhaust gases consist of CO and CO 2 . Exhaust gases does not contain NO 2 Hence, (A,B,C) are correct.
Related: Chemistry — General Principles and Processes of Isolation of Metals · All PYQ Banks