UPSC CSE Prelims 1998 Q106 — Science & Technology PYQ with Answer

Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to

I. Act as a reducing agent.

II. Remove silica associated with the iron ore.

III. Function as fuel, to supply heat.

IV. Act as an oxidizing agent.

Of these statements: