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Q.

The standard emf of a cell, involving one electron change is found to be 0.591 V at 25°C. The equilibrium constant of the reaction is (F = 96500 C mol–1)

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a

1.0×105

b

1.0×1010

c

1.0×101

d

1.0×1030

answer is C.

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Detailed Solution

The Ecell0 is given by

Ecell0=0.0591nlog Keq

∴0.591=0.05911logKeq

or logKeq=0.5910.0591=10 or Keq=1×1010

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