Which process could not be an electrolytic reaction?     a. 2 PbSO4(s) + 4 H2O(l)  Pb(s) + PbO2(s) + 2 H2SO4(aq)   b. 2H2O(l)  2H2(g) + O2(g)   c. 2Al2O3(l)  4Al(l) + 3O2(g)   d. Na+(aq) + Cl−(aq)  2Na(l) + Cl2(g)   e. 2Fe(s) + 3O2(g)  Fe2O3(s)

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Q: exothermic reaction

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