Given,
$E_{A g^{+} / A g}^{\circ} = + 0.80 V, E_{C o^{2 +} / C o}^{\circ} = - 0.28 V, E_{C u^{2 +} / C u}^{\circ} = + 0.34 V, E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 V$ ,
Which metal will corrode to greater extent?

A g

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C u

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C o

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Z n

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Solution

The correct option is D $Z n$
Metal having much more positive potential will Oxidise less easily and coorrode slowly and vice-versa. So, Zinc will corrode fastly.

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Similar questions

Given: $E_{A g^{\oplus} | A g}^{⊖} = + 0.80 V; E_{C o^{2 +} | C o}^{⊖} = - 0.28 V,$

$E_{C u^{2 +} | C u}^{⊖} = + 0.34 V, E_{Z n^{2 +} | Z n}^{⊖} = - 0.76 V$

Which metal will corrode fastest?

E_{N i^{2 +} / N i}^{\circ} = - 0.25 V, E_{C u^{2 +} / C u}^{\circ} = + 0.34 V

E_{A g^{2 +} / A g}^{\circ} = + 0.80 V, E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 V

E_{C u^{2 +} | C u}^{⊖} = 0.34 V, E_{Z n^{2 +} | Z n}^{⊖} = - 0.76 V

E_{A g^{\oplus} | A g}^{⊖} = 0.80 V

N i^{2 +} / N i = 0.25 V, C u^{2 +} / C u = 0.34 V

A g^{+} / A g = 0.80 V

Z n^{2 +} / Z n = - 0.76 V

Z n ∣ ∣ {Z n}^{2 +} (1 M) ∣ ∣ ∣ ∣ {C u}^{2 +} (1 M) ∣ ∣ C u

E_{{C u}^{2 +} / C u}^{o} = 0.34 V

E_{{z n}^{2 +} / Z n}^{o} = - 0.76 V

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