Advertisements
Advertisements
Question
Differentiate between “minerals” and “ores”.
Solution
Minerals are naturally occurring chemical substances containing metals. They are found in the Earth’s crust and are obtained by mining.
Ores are rocks and minerals viable to be used as a source of metal.
For example, there are many minerals containing zinc, but zinc cannot be extracted profitably (conveniently and economically) from all these minerals.
Zinc can be obtained from zinc blende (ZnS), calamine (ZnCO3), Zincite (ZnO) etc.
Thus, these minerals are called ores of zinc.
APPEARS IN
RELATED QUESTIONS
Write the names and chemical formulae of any one ore of iron.
Write the reactions involved in the zone of reduction in blast furnace during extraction of iron.
Write chemical formulae of the following ores :
(a) Calamine
(b) Haematite
(c) Magnetite
(d) Corundum
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
What is the role of CO in the extraction of Iron?
Indicate the principle behind the method used for the refining of zinc.
What is the role of silica in the extraction of copper?
Describe the roles of the following: SiO2 in the extraction of copper from copper matte
Write the names and chemical formulae of any ‘two’ minerals of aluminium.
How will you convert the following:
[Ag(CN)2]− to Ag
Bauxite has the composition
Which among the following statement is correct?
Carbonate ore of iron is ____________.
Which of the following reactions occur during calcination?
(i) \[\ce{CaCo3 -> CaO + CO2}\]
(ii) \[\ce{2FeS2 + 11/2 O2 -> Fe2O3 + 4SO2}\]
(iii) \[\ce{Al2O3. {x}H2O -> Al2O3 + {x}H2O}\]
(iv) \[\ce{ZnS + 3/2 O2 -> ZnO + SO2}\]
Identify a mineral for the major source of boron from the following list?
When a strip of metallic zinc is placed in an aqueous solution of copper nitrate the blue colour of the solution disappear due to formation of
In the thermite process, the reducing agent is:
Metal always found in Free State is
Pyrolusite is ______.