The purpose of roasting of an ore is: \( \mathrm{P} \) (1) to convert oxide ore to sulphide ore ...

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The purpose of roasting of an ore is:
\( \mathrm{P} \)
(1) to convert oxide ore to sulphide ore
W
(2) to reduce it
(3) to separate S, As, Sb impurities
(4) to obtain an alloy
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