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प्रश्न
Write the names and chemical formulae of any one ore of iron.
उत्तर
The important ores of iron are
Haematite Fe2O3,
Limonite 2Fe2O3.3H2O,
Magnetite Fe3O4,
Siderite FeCO3 and
Pyrite FeS2.
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संबंधित प्रश्न
The process of leaching alumina, using sodium carbonate is called
- Bayer's process
- Decomposition
- Cyanide process
- Hall's process
Write the reactions involved in the zone of reduction in blast furnace during extraction of iron.
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
Mention names and formulae of two ores of alumunium.
Purification of aluminium by electrolytic refining is carried out by
(a)Hoope process
(b)Hall process
(c)Baeyer process
(d)Serperck process
What is the role of CO in the extraction of Iron?
What is the role of silica in the extraction of copper?
Name the method used for refining of copper metal.
Write the names and chemical formulae of any ‘two’ minerals of aluminium.
Which among the following minerals does NOT contain aluminium?
(a) Cryolite
(b) Siderite
(c) China clay
(d) Corundum
In the extraction of zinc from zinc blende:
(i) Give an equation to show how zinc oxide is converted to zinc.
(ii) How is impure zinc finally electro-refined?
Describe the role of the Cryolite in the extraction of aluminium from pure alumina.
How will you convert the following:
[Ag(CN)2]− to Ag
Give the uses of zinc.
Metal which is found in free state is:
Which among the following statement is correct?
The most abundant metal on earth is:
The sulphide ore of iron is ____________.
Identify a mineral for the major source of boron from the following list?
The important ore of iron is:-
In the thermite process, the reducing agent is:
Which of the following is not ore of aluminium?
When compared to ΔG° for the formation of Al2O3 ΔG° for the formation of Cr2O3 is
Which of the following is not an ore of magnesiuim?
Pyrolusite is ______.
The ore that contains both iron and copper is ______.
