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JEE Main 27 July 2021 Shift 2 Solved Paper

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Question : 50

Total: 90

The addition of silica during the extraction of copper from its sulphide ore :-

[27 Jul 2021 Shift 2]

converts copper sulphide into copper silicate
converts iron oxide into iron silicate
reduces copper sulphide into metallic copper
reduces the melting point of the reactionmixture

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