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(B) The thermite process involves the reduction of a metal oxide using aluminum powder as a reducing agent,which is highly exothermic.Specifically,the

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$3MnO_2 + 4Al \rightarrow 2Al_2O_3 + 3Mn$

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(B) The thermite process involves the reduction of a metal oxide using aluminum powder as a reducing agent,which is highly exothermic.Specifically,the reaction between metal oxides (like $Fe_2O_3$ or $MnO_2$) and aluminum is used to extract metals.Option $B$ shows the reduction of manganese dioxide $(MnO_2)$ by aluminum to produce manganese $(Mn)$ and aluminum oxide $(Al_2O_3)$,which is a classic example of the thermite process.Therefore,the correct option is $B$.

Among the following,an example of the thermite process is:

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