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Chemistry, 26.01.2021 20:40 noah2o2o

Which of the following chemical reactions is a redox reaction? NH4OH (aq) + KCl (aq) KOH (aq) + NH4Cl (aq)

Zn (s) + H2SO4 (aq) ZnSO4 (aq) + H2 (l)

H2SO4 (aq) + CaCl2 (aq) CaSO4 (aq)+ HCl (aq)

HBr (aq) + KOH (aq) KBr (aq) + H2O (l)

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