Which one of the following is an example of negative catalysis?

Oxidation of

S O_{2}

S O_{3}

in presence of

V_{2} O_{5}

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Combination of

N_{2}

and

H_{2}

to form

N H_{3}

in presence of iron

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Decomposition of

H_{2} O_{2}

in presence of phosphoric acid

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Oxidation of

N H_{3}

in presence of platinum.

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Solution

The correct option is C Decomposition of $H_{2} O_{2}$ in presence of phosphoric acid

$H_{3} P O_{4}$ decreases the rate of decomposition of $H_{2} O_{2}$

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