Question 3 of 85

Which of the following is a redox reaction?

(a) NaCl + KNO3 NaNO3 + KCl

(b) CaC2O4 + 2HCl CaCl2 + H2C2O4

(c) Mg(OH)2 + 2NH4Cl MgCl2 + 2NH4OH

(d) Zn + 2AgCN 2Ag + Zn(CN)2