Question

Which of the above given metal oxides can be reduced by $Fe$ (reducing agent) to its respective metal at temperature $T_1$?

• A. $Zr{O}_2$
• B. $CaO$
• C. $MgO$
• D. None of the above

Answer 1

Answer: (A)

$Zr{O}_2$

Any metal will reduce oxide of other metals which lie above it in the Ellingham diagram because free energy change will become more negative.
So, only Zr can be reduced by Fe.