In the reaction, 2KClO3+MnO2+2KCl+3O2(g)+MnO2, which substance acts as catalyst?
A
O2
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B
KClO3
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C
MnO2
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D
KCl
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E
O2 in the MnO2
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Solution
The correct option is DMnO2 The catalyst used for the decomposition of potassium chlorate to oxygen is manganese dioxide MnO2. In the reaction 2KClO3+MnO2→2KCl+3O2(g)+MnO2, we see that MnO2 is present on the reactant side as well as on the product side. Hence, it is a catalyst. We can rewrite the same reaction as: 2KClO3MnO2−−−−→2KCl+3O2(g).