Chemistry - Metallurgy Question with Solution | TestHub

Roasting is carried out to:
$\mathrm{I}.$sulphide is converted to oxide.
$\mathrm{I}\mathrm{I}.$Remove water of hydration.
$\mathrm{I}\mathrm{I}\mathrm{I}.$Melt the ore.
$\mathrm{I}\mathrm{V}.$Remove arsenic and Sulphur impurities.
of these statements