The question requires balancing the given chemical equation and then using stoichiometry to find the mole ratio between reactants and products. The ratio of Al to Mn in the balanced equation is 4:3.
Manganese is extracted from Manganese dioxide by reaction with Aluminium as described by the following unbalanced chemical equation : MnO₂(s) + Al (s) → Mn (l) + Al₂O₃ (s) The number of moles of Al (s) required to form one mole of Mn from its oxide is
Asked in UPSC CISF AC EXE 2020 · Topic: Metals, Minerals, Ores: Properties, Uses (Extraction of metals from concentrated ores (roasting, calcination, smelting, electrolytic reduction))
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