The role of a catalyst is to lower the activation energy of a reaction. Here spark provide the energy to the reactant molecules to attain the maximum threshold level. Hence spark is not act as a catalyst.
Catalyst is a type of substances which can change the rate of reaction by changing its path.
It can be used to break or reform the chemical bond between the atoms of molecules of different elements.
It only react with reactants to form intermediates and produce final product, finally when the process is complete, the catalyst can regenerate.
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