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Which of the following statements is/are correct?
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a
The chemical processes in the production of steel from haematite ore involve reduction followed by oxidation
b
Lead is extracted from its chief ore galena by both carbon reduction as well as self-reduction
c
In Hall-Heroult process, the electrolyte used is a molten mixture of alumina and cryolite or fluorspar
d
Haematite, cassiterite and argentite are oxide ores
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Correct option is 錷
Argentite, a silver sulfide mineral.Talk to our academic expert!
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