What is catalyst?(according to class 10th science)
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In chemistry, a catalyst is any substance that increases a reaction rate without being consumed on its own. In other words it's a substance that increases the rate of a chemical reaction without being changed in identity. ... If the reactants and the catalyst are in the same phase the catalysis is said to be homogeneous.
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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
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