JEE Main & Advanced Sample Paper JEE Main Sample Paper-6

  • question_answer
    Cryolite is

    A)  \[N{{a}_{3}}Al{{F}_{6}}\] and is used in the electrolysis of alumina,  for   decreasing   electrical conductivity

    B)  \[N{{a}_{3}}Al{{F}_{6}}\] and is used in the electrolysis of alumina for lowering the melting point of alumina

    C)  \[N{{a}_{3}}Al{{F}_{6}}\]and is used in the electrolytic purification of alumina

    D)  \[N{{a}_{3}}Al{{F}_{6}}\]and is used in the electrolysis of alumina

    Correct Answer: B

    Solution :

    Cryolite   \[(N{{a}_{3}}Al{{F}_{6}})\] increases   electrical conductivity and lowers the melting point of alumina.


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