What is emf and how is it used to arrange Metals in
Reactivity Series?
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Answer Posted / girish kumar padhy
EMF is the intrinsic voltage shown by an electrochemical
cell when no current flows through it.
Metals in the reactivity series are arranged in a
descending order in accordance to their standard electrode
reduction potentials w.r.t the standard hydrogen electrode
(This is the accepted IUPAC convention).In this series,
metals which are higher in position oxidise metals which
are at a relatively lower position.Therefore the former
gets reduced and the later gets oxidised.
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