I. Ores are associated with non-metallic impurities II. Ores are asso – InterviewSolution

1.	I. Ores are associated with non-metallic impurities II. Ores are associated with rocky materials. III. Removal of impurities is known as concentration of ore. IV. Ellingham diagram shows the stability of different metal oxides.
Answer» I, II, III & IV Only II Only I III & IV Answer :A

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