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Define Catalyst and Catalysis....

Define Catalyst and Catalysis.

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A catalyst is a substance that increase the rate of reaction without being consumed in the reaction. The phenomenon of increase the rate of reaction with the help of catalyst is known is catalysis. For example in contact process, for the manufacturing of `H_(2)SO_(4)` (Sulphuric acid), `V_(2)O_(5)` is used as catalyst
`2SO_(2)(g) + O_(2) (g) overset(V_(2)O_(5))hArr 2SO_(3)(g)`.
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