Bauxite is :
Na2 . AlF6
Al2O3 .2H2O
2CaCo3 . Cu(OH)2
Cu2O
Argentite is a mineral of
Potassium
Magnesium
Aluminium
Silver
Nickel can be refined by ________method.
Carbonyl
Zone refining
Chemical
Froth floatation method
Which one of the following is malachite ore of copper?
Cu2S
CuFeS2
Cu(OH)2 . CuCo3
Which of the following ores is an ore of copper?
Argentite
Hematite
Malachite
Calamine
Cinnabar is
PbS
PbSO4
HgS
Which of the following is an Epsom salt ?
7CaSO4H2O
BaSO4 2H2O
MgSO47H2O
MgSO4. 2H2O
In electro refining of copper some gold is deposited at
Cathode
Electrode
Cathode mud
Anode mud
The purest zinc is made by
The Mond process
Bessemer process
Electrolytic refining
Bauxite is an ore of :
Iron
Nickel
Copper
