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Electrochemistry
Question
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Standard electrode potential of three metal X, Y and Z are -1.2 V, +0.5 V and -3.0 V respectively. The reducing power of these metals will be

  • Y > X > Z

  • Z> X> Y

  • X > Y > Z

  • Y > Z > X

Answer

B.

Z> X> Y

Exo = -1.2 V;

Eoy = + 0.5 V;
Eoz = -3.0 V;
therefore, Z > X > Y
Because, higher the reduction potential, lesser the reducing power.

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