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An Intiative by Sri Chaitanya
a
Is based on the difference in wettability of different minerals
b
Uses sodium ethyl xanthate, C2H5OCS2Na, as collector
c
Uses NaCN as depressant in the mixture of ZnS and PbS when ZnS forms soluble complex and PbS forms froth
d
Uses pine oil as frothing agent
answer is A.
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