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An Intiative by Sri Chaitanya
a
concentration of ore by froth flotation process
b
leaching of concentrated ore in dilute solution of by passing a current of hot air
c
leaching of concentrated ore in dilute solution of in the absence of air
d
Precipitation of Ag from solution by adding Zinc followed by fusion and electrolytic refining of filtered silver
answer is A, B, D.
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