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General Principles And Processes of Isolation Of Elements
What is the significance of leaching in the extraction of aluminium?
Leaching is significant as it helps in removing the impurities like SiO2, Fe2O3 etc.It is the chemical method used for the concentration of ores. Aluminium is generally extracted from bauxite ore, this ore contains SiO2, iron oxides and titanium oxide as impurities. it is concentrated by digesting the powdered ore with a concentrated solution of NaOH at 473-523 K and 35-36 bar pressure when Al2O3 gets leached out as sodium aluminate.The impurities are left behind.
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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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