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JEE Main20205 Sep 2020Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

An Ellingham diagram provides information about:

Options

  1. Athe conditions of pH and potential under which a species is thermodynamically stable.
  2. Bthe temperature dependence of the standard Gibbs energies of formation of some metal oxides.
  3. Cthe pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction
  4. Dthe kinetics of the reduction process.

Correct answer

B. the temperature dependence of the standard Gibbs energies of formation of some metal oxides.

Step-by-step solution

Ellingham diagram is graph of ΔG ° vs T of any metal/element oxide. since ΔG ° = ΔH ° - TΔS ° for most metal oxide formation metal (s) + oxygen (g) → metal oxide (s) Δ H ° = - ve ΔS ° = - ve so graph will be a straight line with - ve y-intracept & + ve slope.

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