Which of the following is not a redox reaction?
A. H2O(l) + NH3(g) LaTeX: \longrightarrow NH4+(aq) + OH–(aq)
B. 2H2(g) + O2(g) LaTeX: \longrightarrow 2H2O(l)
C. Zn(s) + H2SO4(aq) LaTeX: \longrightarrow ZnSO4(aq) + H2(g)
D. FeSO4(aq) + K2Cr2O7(aq) + 7H2SO4(aq) LaTeX: \longrightarrow Cr2(SO4)3(aq) + 3Fe2(SO4)3(aq) + K2SO4(aq) + 7H2O(l)
E. Cl2(g) + 2KBr(aq) LaTeX: \longrightarrowBr2(l) + 2KCl(aq)
