Given below are statements related to Ellingham diagram :
Statement I : Ellingham diagram can be constructed for oxides, sulfides and halides of metals.
Statement II : It consists of plots of DfH0 vs T for formation of oxides of elements.
In the light of the above statements, choose the most appropriate answer from the options given below :
(1) Statement I is correct but Statement II is incorrect
(2) Statements I is incorrect but Statement II is correct
(3) Both Statement I and Statement II are incorrect
(4) Both Statement I and Statement II are correct


Answer: Option 1Solution: Statement I is correct because the Ellingham diagram can be constructed for oxides, sulfides, and halides of metals. The diagram shows the variation of the standard free energy change (ΔG°) with temperature for the formation of these compounds from the corresponding elements. The diagram is useful in predicting the feasibility of thermal reduction of an ore.

Statement II is also incorrect because the Ellingham diagram consists of plots of ΔG° vs temperature for the formation of oxides, sulfides, and halides of elements. However, the statement incorrectly mentions the use of ΔfH0 (standard enthalpy of formation) instead of ΔG° (standard free energy change).

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