Question

Ellingham diagram is used for

• A. Reduction
• B. Electrolysis
• C. Zone refining
• D. Van Arkel

Answer 1

The correct option is A

Reduction

Explanation for correct option:

A Reduction

1. Ellingham diagram is a curve plotted between Gibb's free energy and temperature.
2. In metals, the Ellingham diagram is employed to determine the equilibrium temperature between metals, metal oxides and sulfides.
3. We know that in metallurgy metals are obtained by the reduction of metal oxides and sulfides.
4. So, the Ellingham diagram is used in reduction.

Explanation for incorrect option:

B Electrolysis

1. In metals, Ellingham diagram is employed to determine the equilibrium temperature between metals, metal oxides and sulfides.
2. We know that in metallurgy metals are obtained by the reduction of metal oxides and sulfides.
3. So, the Ellingham diagram is used in reduction.

C Zone refining

1. In metals, Ellingham diagram is employed to determine the equilibrium temperature between metals, metal oxides and sulfides.
2. We know that in metallurgy metals are obtained by the reduction of metal oxides and sulfides.
3. So, the Ellingham diagram is used in reduction.

D Van Arkel

1. In metals, Ellingham diagram is employed to determine the equilibrium temperature between metals, metal oxides and sulfides.
2. We know that in metallurgy metals are obtained by the reduction of metal oxides and sulfides.
3. So, the Ellingham diagram is used in reduction.

Hence option A is correct, the Ellingham diagram is used for reduction.