JEE Main 27 July 2021 Shift 2 Solved Paper

Section: Chemistry

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Question : 50 of 90

Marks: +1, -0

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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