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Question

1 mol of KClO3 is heated in the presence of MnO2. The produced oxygen is used to react with aluminium. Find the number of moles of aluminium oxide formed.
  1. 2 mol
  2. 3 mol
  3. 1 mol
  4. 4 mol


Solution

The correct option is C 1 mol
The balanced reactions involve are:
KClO3ΔKCl+32O2
2Al+32O2Al2O3

1 mol of KClO3 produces 1.5 mol of O2 gas.
In the seccond reaction, 1.5 mol of O2 will produce 1 mol of Al2O3.

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