The slag formed in extraction of copper is
CuFeS2
Cu20 + Fe S
Cu2S + FeO
Fe SiO3
Scientific and technological process used for isolation of the metal from its ores is known as
Metallurgy
Metallica
Metallography
None of these
The composition of malachite is
CaSO4 2H2o
Ca3(PO4)2
CuCO3. Cu (OH)2
PbSO4
Which of the following is an Epsom salt ?
7CaSO4H2O
BaSO4 2H2O
MgSO47H2O
MgSO4. 2H2O
In zone refining method, the molten zone
Contains impurities
Contains purified metal only
Contains more impurity than the original metal
Moves the either side
Calamine is
CaCO3
Mg CO3
ZnCO3
HgS.
Which element has the largest abundance in the earth’s crust?
Aluminium
Calcium
Magnesium
Sodium
