Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> In iron production, coking coal and limestone are also used apart from iron ore. What is the proportion required for the production?

• A. 1 : 1 : 1
• B. 2 : 1 : 1
• C. 3 : 2 : 1
• D. 4 : 2 : 1

Answer 1

The correct option is D 4 : 2 : 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> In iron production, coking coal and limestone are used apart from iron ore. They are required in the ratio of 4:2:1. In case of steel production, manganese is used to harden the steel.