Engineering
Chemistry
Roasting Calcination or Smelting
Reduction
Extraction of Iron and Copper
Question
What happens when: manganese dioxide is heated with aluminium powder ?
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Solution
When manganese dioxide (MnO2) is heated with aluminium powder, displacement reaction takes place, and manganese is obtained as the product along with aluminium oxide. It is an exothermic reaction and hence Mn is obtained in molten form.
3MnO2(s) + 4Al(s) → 3Mn(l) + 2Al2O3(s) + heat