Question

The statement that is incorrect about Ellingham diagram is :

• A. provides idea about reduction of metal oxide
• B. provides idea about changes in the phases during the reaction
• C. provides idea about the reaction rate.
• D. provides idea about free energy change.

Answer 1

The correct option is C provides idea about the reaction rate.

An Ellingham diagram is a graph showing the temperature dependence of the stability of compounds. This analysis is usually used to evaluate the ease of reduction of metal oxides and sulfides.
In metallurgy, the Ellingham diagram is used to predict the equilibrium temperature between a metal, its oxide, and oxygen and by extension, reactions of a metal with sulfur, nitrogen, and other non-metals. The diagrams are useful in predicting the conditions under which an ore will be reduced to its metal. The analysis is thermodynamic in nature and ignores reaction kinetics.
Option (a) is incorrect