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Representation of Cell

Mg, Al, Zn, F...

Question

$M g, A l, Z n, F e$ and $A g$ are metals of reactivity series:
(a) Which of this metal shows the highest reactivity?
(b) If an electrochemical cell is devised by dipping Fe in $F e S O_{4}$ solution and Ag in $A g N O_{3}$ solution, which electrode is acting as cathode? Give reason.

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Solution

(a) Mg has the highest reactivity.
(b) Ag can be used cathode. This is because the electrode at which reduction takes place (one which accepts electrons) is the cathode.

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