First slide

Activity Series (OR) Electro chemicals series

Question

Which of the following is displaced by Fe?

Easy

A

Ag
B

Zn
C

Na
D

All of these

Solution

$\begin{array}{l} E_{{Na}^{+} ∣ Na}^{\circ} < E_{{Zn}^{2 +} ∣ Zn}^{\circ} < E_{{Fe}^{3 +} ∣ Fe}^{\circ} < E_{{Ag}^{+} ∣ Ag}^{\circ} \\ E_{{Fe}^{3 +} ∣ Fe}^{\circ} + E_{Ag ∣ {Ag}^{+}}^{\circ} = + ve (spontaneous) \end{array}$

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