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16 (a) Expl the following(i) Al is used in the extraction of Cr from chromium oxide(ii) Role of cryolite in the metallurgy of aluminium. |
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Answer» In themetallurgy of aluminium, the metal is to be isolated from alumina (Al2O3) by carrying out its electrolytic reduction. ... It is therefore, mixed withcryolite(Na3AIF6) which lowers its melting point to 1173 K. Moreover,cryolitealso increase the electrical conductivity of alumina. |
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