Which of the following metals cannot be extracted by the smelting proc – InterviewSolution

InterviewSolution

1.	Which of the following metals cannot be extracted by the smelting process ? Al, Zn,Fe, Pb
Answer» Solution :Aluminiumcannotbeextractedbythesmeltingprocessbecauseoffollowingreasons : (i) Alishighlyelectropositiveelementhavingverystrongaffinityforoxygen. Therefore , `Al_2O_3 `isverystablecompoundand hencecannotbereducedbycarbon. (ii) `Al_2O_3 `whenheatedwithcarbonformsaluminumcarbide. `""2 Al_2O- 3+9 C toAl _ 4 C_3 + 6CO`

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