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General Principles And Processes of Isolation Of Elements
This method is based on the fact that more electropositive metal can displace less electropositive metal from its salt solution. The concentrated ore is bleached with aqueous solution of suitable reagent (NaCN solution of Cl2in the presence of water) to extract the metal salt in complex salts solution in water. The salt solution is then either electrolyzed or precipitated by adding more electropositive metal. This method also known as complex salt formation method.
Ag2S +4NaCN → 2Na[Ag(CN)2] +Na2S
2Na[Ag(CN)2] +Zn → 2Ag +Na2[Zn(CN)4]
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What is the significance of leaching in the extraction of aluminium?
Is it true that under certain conditions. Mg can reduce Al2O3 and Al can reduce MgO? What are those conditions?
Titanium is a metal of modern times. It is obtained as oxide. Why it could not be extracted earlier despite its wide occurence?
Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?
What criterion is followed for the selection of the stationary phase in chromatography?
What is the role of cryolite in the metallurgy of aluminium?
Why is zinc not extracted from zinc oxide through reduction using CO?
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