In forth floatation process for the purification of ores the particles of ore float because.
Their surface is not easily wetted by water.
They are light
They are insoluble
They bear electrostatic charge.
The composition of malachite is
CaSO4 2H2o
Ca3(PO4)2
CuCO3. Cu (OH)2
PbSO4
Impurities present in then ore react to form a fusible substance known as.
Gangue
Nugget
Mineral
The slag formed in extraction of copper is
CuFeS2
Cu20 + Fe S
Cu2S + FeO
Fe SiO3
Which of the following ores is an ore of copper?
Argentite
Hematite
Malachite
Calamine
Cinnabar is
Cu2S
PbS
HgS
Nickel can be refined by ________method.
Carbonyl
Zone refining
Chemical
Froth floatation method
