AP EAMCET202317 May 2023Morning ShiftChemistryElectrochemistryActual
Observe the following Ellingham diagram, and identify the incorrect statement regarding it
Options
- AAt point ' A ' for the reduction of Al ₂ O ₃ by Mg , G ^ =0
- BBelow 1673 ~K , Mg can reduce Al ₂ O ₃ to Al
- CBelow 1673 ~K , Al can reduce MgO to Mg
- DAbove 1673 ~K , Al can reduce MgO to Mg
Correct answer
C. Below 1673 ~K , Al can reduce MgO to Mg
Step-by-step solution
Since the 4 3 Al + O ₂ 2 3 Al ₂ O ₃ line lies above the 2 Mg + O ₂ 2 MgO line, Al cannot reduce MgO + Mg below 1673 ~K . This is because of the less negative value of G ^ for 4 3 Al + O ₂ 2 3 Al ₂ O ₃