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Which one of the following metals can not be extracted by using Al as a reducing agent ? (a) W from WO3 (b) Mn from Mn3O4 (c) Cr from Cr2O3 (d) Na from Na2O |
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Answer» Correct option (d) Na from Na2O Explanation: Sodium metal can not be extracted by using Al as reducing agent because Na is more electropositive than aluminium. |
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