The addition of MnO₂ to KClO₃decreases the temperature at which KClO₃ decomposes because MnO₂ added acts as ______ catalyst.

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Solution

Decomposition reaction: It is the type of reaction in which a substance decomposes into two or more substances having different properties than its initial.
Decomposition of KClO₃(Potassium chlorate) requires heat for decomposition.
The addition of MnO₂as a catalyst decreases the temperature at which KClO₃ decomposes.
Catalyst: These are the substances that upon addition to reaction will alter the rate of reaction.
A positive catalyst is the one that increases the rate of reaction, and a negative catalyst is the one that decreases the speed of reaction.
Here, as the addition of MnO₂ increases the speed of reaction, hence it is a positive catalyst.
Concluding statement: Therefore, the addition of MnO₂ to KClO₃decreases the temperature at which KClO₃ decomposes because MnO₂ added acts as a positive catalyst.

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[CPMT 1971,76,80,94]

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The addition of MnO2 to KClO3 decreases the temperature at which KClO3 decomposes because MnO2 added acts as ______ catalyst.

The addition of MnO₂ to KClO₃decreases the temperature at which KClO₃ decomposes because MnO₂ added acts as ______ catalyst.