Analyze the given reaction below:

$2 H_{2} O_{2} (l) M n O_{2} ⟶ 2 H_{2} O (l) + O_{2} (g)$

Which component will be left after the completion of the reaction?

2 H_{2} O_{2}

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M n O_{2}

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2 H_{2} O

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O_{2}

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Solution

The correct option is B $M n O_{2}$
The given reaction is a decomposition reaction of hydrogen peroxide giving out water and oxygen. Manganese dioxide is a positive catalyst here. A positive catalyst increases the rate of the reaction without itself undergoing any chemical change. Therefore, the component which will be left after the completion of the reaction is manganese dioxide.

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