what is catalyst ? give one example of it
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The substance in whose presence the rate of a chemical reaction changes , without causing any chemical change to it , is called a catalyst .
example : manganese dioxide.
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Catalysis is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst. Catalysts are not consumed in the catalyzed reaction but can act repeatedly. Often only very small amounts of catalyst are required.
ex- Enzymes are proteins that act as catalysts in biochemical reactions
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