Assertion : Extraction of iron metal from iron oxide ore is carried...

Extraction of iron metal from iron oxide ore is carried out by heating with coke and flux (calcium carbonate). Flux is a slag forming substance. It converts infusible impurities into fusible slag. The reaction : $\mathrm{Fe}_2 \mathrm{O}_{3(s)} \rightarrow \mathrm{Fe}_{(s)}+3 / 2 \mathrm{O}_{2(\mathrm{~g})}$ is not a spontaneous process. $\mathrm{Fe}_2 \mathrm{O}_3$ is converted to $\mathrm{FeO}$ at about $400^{\circ} \mathrm{C} . \mathrm{FeO}$ is converted to $\mathrm{Fe}$ at about $800^{\circ} \mathrm{C}-1000^{\circ} \mathrm{C}$