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NTA Abhyas NEET2020ChemistryElectrochemistryPractice

Given E Ag ⊕ |Ag o = + 0 .80 V; E Co 2+ |Co o = − 0 .28 V, E Cu 2+ |Cu o = + 0 .34 V, E Zn 2+ |Zn o = − 0 .76 V . Which metal will corrode fastest?

Options

  1. AAg
  2. BCu
  3. CCo
  4. DZn

Correct answer

D. Zn

Step-by-step solution

Here Zinc will corrode fastest as it has maximum tendency to get oxidized due to maximum E O P o here or minimum E R P o here. Tendency to corrode ∝ negative value of E R P o E Zn 2+ |Zn o is most negative.

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