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RAJASTHAN PMT Rajasthan - PMT Solved Paper-2004

  • question_answer
    In the electrolysis of alumina, cryolite and \[Ca{{F}_{2}}\]are added to:

    A)  increase the emf of cell

    B)  decrease the emf of cell

    C)  decrease the melting point

    D)  both (b) and (c)

    Correct Answer: C

    Solution :

    Cryolite and \[Ca{{F}_{2}}\](fluorospar) are added to alumina in its electrolysis to decrease its melting point and to increase the electrical conductivity.


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