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Types of Catalysis

When KClO3 ...

Question

When $K C l O_{3}$ is heated, it decomposes into $K C l$ and $O_{2}$ . If some $M n O_{2}$ is added, the reaction goes much faster because:

M n O_{2}

decomposes to give

O_{2}

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M n O_{2}

provides heat by reacting

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better contact is provided by

M n O_{2}

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M n O_{2}

acts as a catalyst

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Solution

The correct option is D $M n O_{2}$ acts as a catalyst
The decomposition of $K C l O_{3}$ in presence of $M n O_{2}$ can be given as follow:

$2 K C l O_{3} M n O_{2} - --- \to 2 K C l + 3 O_{2}$

In this reaction, the $M n O_{2}$ acts as a catalyst. Thus, it increases the rate of the reaction.

Hence, option D is correct.

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Similar questions

When is heated, it decomposes into . If some is added, the reaction goes much faster because

[CPMT 1971,76,80,94]

K C l O_{3}

K C l

O_{2}

M n O_{2}

_______ + heat $⟶ K_{2} M n O_{4} + M n O_{2} + O_{2}$

2 K C l O_{3} + M n O_{2} + 2 K C l + 3 O_{2} (g) + M n O_{2}

M n O_{2} + 2 K C l O_{3} ⟶ K_{2} M n O_{4} + C l_{2} + 2 O_{2}

C l_{2} + K M n O_{4} ⟶ 2 K C l + M n O_{2} + O_{2}

50 %

11.2

O_{2}

K C l O_{3}

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