Question

During the production of iron and steel :

• A. The oxide ore is primarily reduced to iron by solid coke according to the reaction -
  $2F{e}_2{O}_3$ + $3C$ $\to$ $4Fe$ + $3C{O}_2$
• B. The oxide ore is reduced by the carbon monoxide according to the reaction -
  $F{e}_2{O}_3$ + $3CO$ $\to$ $2Fe$ + $3C{O}_2$
• C. Major silica impurities are removed as calcium silicate slag by addition of a fluxing agent limestone
• D. The silicate slag is used in manufacturing cement

Answer 1

Answer: (B), (C), (D)

The oxide ore is reduced by the carbon monoxide according to the reaction -
$F{e}_2{O}_3$ + $3CO$ $\to$ $2Fe$ + $3C{O}_2$
Major silica impurities are removed as calcium silicate slag by addition of a fluxing agent limestone
The silicate slag is used in manufacturing cement

(A) and (B) The oxide ore is reduced by the carbon monoxide according to the reaction : $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$
Thus option B is correct and option A is incorrect.

(C) Major silica impurities are removed as calcium silicate slag by addition of a fluxing agent limestone
$CaO+Si{O}_2\to CaSi{O}_3$
Thus option C is correct.

(D) The silicate slag is used in manufacturing cement.

Thus option D is correct.