An unknown metal displaces cadmium (cd) from solution but does not displace chromium (cr). using the activity series, determine the unknown metal.. select one of the options below as your a. lead (pb) b. manganese (mn) c. iron (fe)d. zinc (zn) e. cobalt (co)

Using the activity series, it can be determined that the unknown metal is iron (Fe). I t lies between Cadmium and Chromium in the activity series. The correct option among all the options that are given in the question is the third option or option "C". I hope that the answer has actually helped you.