Oxidation of ore is involved in: \( \mathrm{P} \) (1) Calcination of calamine W (2) Heating of h...

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Oxidation of ore is involved in:
\( \mathrm{P} \)
(1) Calcination of calamine
W
(2) Heating of hematite with aluminium
(3) Roasting of galena
(4) None of these
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