General Principles and Processes of Isolation of Elements — Prelims Questions

Which of the following statements is incorrect regarding the Ellingham diagram?

Which of the following refining methods is based on the principle that impurities are more soluble in the molten state than in the solid state of the metal?

Which of the following reactions represents calcination?

In the extraction of aluminium by the Hall-Héroult process, what is the role of cryolite ($\text{Na}_3\text{AlF}_6$)?

Which of the following statements is correct regarding the froth flotation process?

In the Mond process for refining nickel, the volatile compound formed is: