1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the following statements related to Ellingham diagrams are correct? (i) It provides a sound basis for the choice of reducing agent in the reduction of oxides. (ii) Each Ellingham plot is represented by a straight line untill unless there is some change in phase i.e. solid arrow liquid, liquid arrow gas and gas arrow liquid occurs. (iii) Diagrams similar to Ellingham can be constructed for sulphides and halides which clearly indicates why reduction of Mx S is difficult in comparison to M x O. (iv) Ellingham diagrams predicts the tendency of reduction with a reducing agent and kinetics of the reduction process.

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Q. Which of the following statements related to Ellingham diagrams are correct?
(i) It provides a sound basis for the choice of reducing agent in the reduction of oxides.
(ii) Each Ellingham plot is represented by a straight line untill unless there is some change in phase i.e. solid $\rightarrow$ liquid, liquid $\rightarrow$ gas and gas $\rightarrow$ liquid occurs.
(iii) Diagrams similar to Ellingham can be constructed for sulphides and halides which clearly indicates why reduction of $M_x S$ is difficult in comparison to $M _{ x } O$.
(iv) Ellingham diagrams predicts the tendency of reduction with a reducing agent and kinetics of the reduction process.

General Principles and Processes of Isolation of Elements

Solution:

Ellingham diagram represents plot between $\Delta G^{\circ}$ and $T$ therefore with increase in temperature phase change Gas $\rightarrow$ Liquid is not possible. Ellingham diagram does not give any information about kinetics of the reduction reaction.