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JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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Which of the following ores does not contains oxygen?
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Correct option: B
Chalcopyrite
Option B (Chalcopyrite) is correct because Chalcopyrite (CuFeS2\mathrm{CuFeS}_2) is a sulfide mineral and does not contain oxygen in its chemical formula.

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