Which pairs of reactants will result in a chemical reaction? Check all that apply Als) + AgCIO ₃ (aq) Pb(s) + CuNO ₃ (aq) Sn(s) + MgCl ₂ (aq) Pt(s)+ CoBr ₂ (aq) At least one of your choices is incorrect. A more active metal can displace a less active metal from a compound, but not the other way around. You'll need to refer to the activity series to determine which metal in the pair is more active.