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प्रश्न
Name the method used for refining of copper metal.
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उत्तर
Copper is refined by an electrolytic method. Pure copper is obtained at the cathode.
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संबंधित प्रश्न
What is the role of CO in the extraction of Iron?
Indicate the principle behind the method used for the refining of zinc.
Define Leaching.
Explain the following methods to protect metals from corrosion:
Passivation
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?
Give the uses of zinc.
Metals which occur in their native state in nature:
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.
Metal always found in Free State is
When compared to ΔG° for the formation of Al2O3 ΔG° for the formation of Cr2O3 is
