Question

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 answer:A. lead (Pb) B. manganese (Mn) C. iron (Fe)D. zinc (Zn) E. cobalt (Co)

Answer 1

Answer: The correct answer is Iron (Fe).

Explanation:

When a metal displaces another metal from a solution, it is considered as a reactive metal and the reactivity of metal is judged by the reactivity series of the metal.

Whenever one metal displaces another metal from its salt solution, it is considered as a Single-displacement reactions.

In a reactivity series, the metal which is present above in the series will easily displace a metal which is present below in the series.

We need to find an unknown metal which easily displaces cadmium metal from a solution which means that a metal is present above in the reactivity series and the same metal does not displace chromium which means that it is present below chromium. Hence, the unknown metal is iron.

Reactivity series is attached below.

Answer 2

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.