………..method is based on the wetting of the ore and gangue with pine oil and water.
a) Distillation
b) Calcination
c) liquification
d) froth floatation
Method especially used for sulphide ore is….
a) refininig
b) hand picking
c) electrolysis
d) froth floatation
In froth floatation method a mixture of…...are used.
a) pine oil
b) water
c) detergents
d) all of these
Magnetic separation method is used for the separation of ……….from non-magnetic ore by using magnetic separator.
a) magnetic ore
b) non-magnetic ore
c) both a & b
d) none of these
Extraction of metals:-
When the ore is free of gangue and ……….., metals is extracted from it.
a) dilute
b) concentrated
c) saturated
d) unsaturated
