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Addition of cryolite and fluorspar to al...

Addition of cryolite and fluorspar to alumina produces a dangerous by-product'. Comment.

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(i) Common element present in cryolite and fluorspar.
(ii) Ions present in cryolite and fluorpar.
(iii) Products obtained at the electrodes on complete electrolysis.
(iv) Nature of the products.
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In spite of the addition of cryolite and fluorspar to alumina only Al^(+3)andO^(-2) ions are discharged at their respective electrodes. Justify.

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Knowledge Check

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    B
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  • Addition of water to metallic sodium produces

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    C
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