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प्रश्न
Define leaching.
Define the following term.
Leaching
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उत्तर
Leaching is the process by which nutrients and soluble minerals are washed downward through the soil layers by heavy rainfall or excessive irrigation.
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संबंधित प्रश्न
Write the names and chemical formulae of any one ore of zinc.
Write the names and chemical formulae of any one ore of iron.
Mention names and formulae of two ores of alumunium.
What is the role of limestone in the extraction of iron from its oxides?
What is the role of CO in the extraction of Iron?
What is the role of coke in the extraction of iron from its oxides?
Indicate the principle behind the method used for the refining of zinc.
Describe the roles of the following: SiO2 in the extraction of copper from copper matte
Which among the following minerals does NOT contain aluminium?
(a) Cryolite
(b) Siderite
(c) China clay
(d) Corundum
Explain the following methods to protect metals from corrosion:
Galvanization
Draw a neat, well labelled diagram of electrolytic cell for extraction of aluminium
What is 'copper matte' ?
What is the role of the following compound-
SiO2 in the extraction of copper from copper pyrites?
How will you convert the following:
[Ag(CN)2]− to Ag
Bauxite has the composition
What are the differences between minerals and ores?
Metals which occur in their native state in nature:
Metal which is found in free state is:
Which of the following options are correct?
(i) Cast iron is obtained by remelting pig iron with scrap iron and coke using hot air blast.
(ii) In extraction of silver, silver is extracted as cationic complex.
(iii) Nickel is purified by zone refining.
(iv) Zr and Ti are purified by van Arkel method.
The main reactions occurring in blast furnace during extraction of iron from haematite are:
(i) \[\ce{Fe2O3 + 3CO -> 2Fe + 3CO2}\]
(ii) \[\ce{FeO + SiO2 -> FeSiO3}\]
(iii) \[\ce{Fe2O3 + 3C -> 2Fe + 3CO}\]
(iv) \[\ce{CaO + SiO2 -> CaSiO3}\]
Write the chemical reactions involved in the extraction of gold by cyanide process. Also give the role of zinc in the extraction.
In the electrolytic process for the extraction of aluminium the electrolyte is:-
Which of the following is not ore of aluminium?
Native silver metal forms a water solution complex with dilute solution of Na CN in the presence of
Calamine and Malachite, respectively, are the ores of ______.
