The process,which does not use a catalyst is

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(B) catalyst is a substance that lowers the activation energy of a reaction by providing an alternate pathway. Generally,a catalyst increases the spee

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Thermite process

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(B) catalyst is a substance that lowers the activation energy of a reaction by providing an alternate pathway. Generally,a catalyst increases the speed of a reaction.In the thermite process,the reaction $2 Al + Fe_2O_3 \rightarrow Al_2O_3 + 2 Fe$ (or similar metal oxide reductions) is highly exothermic and proceeds rapidly without the need for a catalyst.In contrast,the Contact process uses $V_2O_5$,the Ostwald process uses $Pt/Rh$ gauze,and the Haber process uses $Fe$ with $Mo$ as a promoter.

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