Question

What type of extraction is the carbon monoxide reduction process used for?

(a) Cu

(b) Ag

(c) Fe

(d) Sn

The question was asked in an interview.

I would like to ask this question from Uses of Aluminium, Copper, Zinc and Iron in section General Principles and Processes of Isolation of Elements of Chemistry – Class 12

Answer 1

The correct answer is (c) Fe

To elaborate: The reduction of the ore. At the high temperature at the bottom of the furnace, carbon dioxide reacts with carbon to produce carbon monoxide. It is the carbon monoxide which is the main reducing agent in the furnace. In the hotter parts of the furnace, the carbon itself also acts as a reducing agent.