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Why is the reductio of a meal oxide easi...

Why is the reductio of a meal oxide easier if the metal foremd is in liquid state in the temperature of reduction?

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The entropy is higher if the metal is in liquid state than when it is in solid state. The value of entropy change `(DeltaS)` of the reduction process is more on positive side when the metal formed is in liquid state and the metal oxide being reduced is in solid state. Thus the value of `Delta_(r)G^(Ө)` V becomes more on negative side and the reduction becomes easier
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Why is the reductio of a meal oxide easier if the metal foremd is in liquid state in the temoerature of reduction?

(a) Suggest a condition under which magnesium could reduce alumina. (b) Although thermodynamically feasible, in practice magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ? ( c) What is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction ? (d) At a site, low grade copper ores oare available and zinc and iron scraps are also available. Which of the two scraps would be more suitable for reducing the leached copper ore and why ?

Assertion : Reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction. Reason : Ihe entropy is higher if the metal is in liquid state.

NCERT-GENERAL PRINCIPLES AND PROCESSESS OF ISOLATION OF ELEMENTS -Exercise
  1. Why is the reductio of a meal oxide easier if the metal foremd is in l...

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  2. Which of the ores mentioned in Table 6.1 can be concentrated by magnet...

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  3. What is the significance of leaching in the extraction of aluminium?

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  4. The reaction Cr2O3+2AltoAl2O3+2Cr (triangleG^(ɵ)=-421kJ)) Is therm...

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  5. It is true that under certain condition, Mg can reduce Al2O3 and Al ca...

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  6. Copper can be extracted by hydrometallurgy but not zinc because

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  7. What is the role of depressant in froth floatation process?

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  8. Why is the extraction of copper from pyrites more difficult than that ...

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  9. Explain: (i). Zone refining (ii). Column chromatography.

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  10. Out of C and CO, which is a better reducing agent at 673K?

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  11. Name the common elements present in the anode mud in electrolytic refi...

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  12. Write down the reactions taking place in different zones in the blast ...

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  13. Write down the chemical reactions taking place in the extraction of zi...

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  14. State the role of silica in the metallurgy of copper.

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  15. Which method of refining may be more suitable if element is obtained i...

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  16. Which method of refining will you suggest for an element in which impu...

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  17. Describe a method for refining nickel.

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  18. How can you separate alumina from silica in a bauxite ore associated w...

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  19. Giving examples differentiate between roasting and calcination.

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  20. How is ‘cast iron’ different from ‘pig iron”?

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  21. Differentiate between “minerals” and “ores”.

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