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Is it possible to extract Al by the elec...

Is it possible to extract Al by the electrolysis of an aqueous solution of aluminium sulphate? Explain.

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The tendency of `Al^(3+)` ion to be reduced is less tha that of `H^(+)` ion, Therefore `H_(2)` gas is liberated at the cathode instead of aluminium,
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CHHAYA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE (SHORT ANSWER-TYPE QUESTIONS)
  1. Differentiate between hydrometallurgy and electrometallurgy with suita...

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  2. Is it possible to extract aluminium by electrolytic reduction of Al(2)...

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  3. Is it possible to extract Al by the electrolysis of an aqueous solutio...

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  4. Copper is obtained by roasting its sulphide ore - explain.

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  5. Discuss the thermodynamic principles of metallurgy.

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  6. Explain why the following reaction, although thermodynamically feasibl...

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  7. Discuss the limitations of Ellingham diagram.

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  8. Name the precious metals in anode mud? Unlike copper, these metals do ...

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  9. The (C,CO) line on the Ellingham diagram slopes downwards. Give reason...

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  10. The (Co, CO(2)) line on the Ellingham diagram slopes upwards. Give rea...

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  11. Write the reactions taking place in different zones in the blast furna...

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  12. In metallurgy, the sulphide ore of copper is partly roasted. Why?

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  13. How can ZnS be separated from a mixture of PbS and ZnS?

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  14. Mention an important use of the thermite process.

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  15. What is the difference between carbon reduction and electrolytic reduc...

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  16. Aluminium reduces Cr(2)O(3) to Cr, but chromium cannot reduce Al(2)O(3...

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  17. What is vapour phase refining ? Explain with an example.

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  18. Give an example of extraction of a metal both by oxidation and reducti...

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  19. CO is a more effective reducing agent than C (coke) below 983K, but C ...

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  20. Althrough Cu and Ag are placed below hydrogen in the electrochemical s...

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