a)During the reduction of iron ore, a dense layer of iron formed initially in the iron ore pellet. After that the reduction completed within 20minute at 900C, if the reaction is happening at 850C what would be time for completion. Consider that the required CO in CO+CO2 mixture is present in the gas during both the reduction. b)Iron reduction from pure hematite in a furnace using Cand 02. Consider the furnace is using counter current technology just like Blast furnace. The exit gas contain 1:2 (CO:CO2). How many moles of O2 is consumed for reduction of 1 moles of Fe