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  3. 11th Class
  4. Chemistry
  5. Organic Chemistry: Some Basic Principles & Techniques / कार्बनिक रसायन : कुछ मूलभूत सिद्धांत एवं तकन

11th Class Chemistry Organic Chemistry: Some Basic Principles & Techniques / कार्बनिक रसायन : कुछ मूलभूत सिद्धांत एवं तकन

  • question_answer 22)
     What is the role of cryolite in the metallurgy of aluminium?

    Answer:

    In the metallurgy of aluminium, the metal is to be isolated from alumina (Al2O3) by carrying out its electrolytic reduction. The melting point of alumina very high (2323 K). It is therefore, mixed with cryolite (Na3AIF6) which lowers its melting point to 1173 K. Moreover, cryolite also increase the electrical conductivity of alumina.


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