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In a mixture of ${KMnO}_{4}$ and $H_{2} C_{2} O_{4}, {KMnO}_{4}$ decolorizes faster at higher temperature than lower temperature.

A catalyst participates in a chemical reaction by forming temporary bonds with the reactant resulting in an intermediate complex.

In collision theory, only activation energy determine the criteria for effective collision.

Collision theory assumes molecules to be soft spheres and consider their structural aspects.

answer is A, B.

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Detailed Solution

With an increase in temperature, water particle kinetic energy rises. As a result, the hot water's particles move more quickly. This quickens the dissemination process. Because of this, potassium permanganate diffuses more quickly in hot water than in cold.

Through the transient bonds it forms with the reactant, a catalyst takes part in a chemical reaction, creating an intermediate complex.

Hence, options A and B are correct.

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