Extraction of Iron — Prelims Questions

Which of the following reactions is the primary source of the reducing agent in the blast furnace for iron extraction?

What is the main function of limestone ($CaCO_3$) when added to the blast furnace during the extraction of iron?

Which of the following iron ores is magnetic and contains the highest percentage of iron?

Which of the following reactions occurs predominantly in the upper part of the blast furnace (400-700°C)?

Which of the following is the purest form of commercial iron?

What is the approximate temperature range in the zone of combustion (tuyere zone) of a blast furnace?