Froth floatation process used for the concentration of sulphide ore : (a) is based on the differ...

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Froth floatation process used for the concentration of sulphide ore :
(a) is based on the difference in wettability of different minerals.
(b) uses sodium ethyl xanthate, \( \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OCS}_{2} \mathrm{Na} \) as collector.
(c) uses \( \mathrm{NaCN} \) as depressant in the mixture of \( \mathrm{ZnS} \) and \( \mathrm{PbS} \) when \( \mathrm{ZnS} \) forms soluble complex and \( \mathrm{PbS} \) forms froth.
(d) All are correct statements.
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