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What is the role of cryolite in the meta...

What is the role of cryolite in the metallurgy of aluminium?

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The roles of cryolite in the metallurgy of aluminium are as follows:
a. It makes alumina a good conductor of electricity.
b. It lowers the fusion (melting point) temperature of alumina from 2223K to about 1140K.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX INORGANIC VOLUME 2-Exercises
  1. Differentiate between “minerals” and “ores”.

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  2. Why copper matte is put in silica lined converter?

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  3. What is the role of cryolite in the metallurgy of aluminium?

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  4. What is the process of leaching in case of low grade copper ores ?

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  5. Why is zinc not extracted from zinc oxide through reduction using CO?

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  6. The value ofDelta (f) G^(Ө) for formation of Cr(2) O(3) is – 540 kJmo...

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  7. Out of C and CO, which is a better reducing agent for ZnO ?

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  8. The choice of a reducing agent in a particular case depends on thermod...

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  9. Name the processes from which chlorine is obtained as a by-product. Wh...

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  10. What is the role of graphite rod in the electrometallurgy of aluminium...

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  11. Outline the principles of refining of metals by the following methods:...

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  12. Predict conditions under which Al might be expected to reduce MgO. (...

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  13. Discuss the general characteristics of Group 15 elements with referenc...

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  14. Why does the reactivity of nitrogen differ from phosphorus?

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  15. Discuss the trends in chemical reactivity of group 15 elements.

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  16. Why does NH(3) form hydrogen bond but PH(3) does not?

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  17. How is nitrogen prepared in the laboratory? Write the chemical equatio...

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  18. State three different chemical compounds other than acids manufactured...

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  19. Pb + conc. HNO(3) gives

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  20. Give the resonating structures of NO(2) and N(2)O(5).

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