JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank Self Evaluation Test - The p-Block Elements (Group 13 and Group 14)

  • question_answer
    The role of fluorspar \[(Ca{{F}_{2}})\] which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite \[(N{{a}_{3}}Al{{F}_{6}})\] is

    A) as a catalyst

    B) to make the fused mixture very conducting

    C) to increase the temperature of the melt.

    D) to decrease the rate of oxidation of carbon at the anode.

    Correct Answer: B

    Solution :

    [b] \[Ca{{F}_{2}}\] when added to fused cryolite, lowers the m.p. and increases the conductivity.


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