JAMB - Chemistry (1985 - No. 4)
A correct electrochemical series can be obtained from K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging?
Al and Mg
Zn and Fe
Zn and Pb
Pb and H
Au and Hg
Paliwanag
The electrochemical series, also known as the activity series, is a list of metals listed in order of decreasing reactivity or in order of decreasing ease of oxidation.
Magnesium comes before Aluminium in the series