Verified Solution • 2025–26 Session moderate

QAIPMT-2004-Ch-2580: NEET 2004 Chemistry - Class 12 AIPMT-2004-Ch-2580 Solution: The standard e.m.f. of a galvanic cell involving cell reaction…

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at

25^\circ C

. The equilibrium constant of the reaction would be

Multiple Choice Options

A $2.0\times10^{11}$
B $4.0\times10^{12}$
C $1.0\times10^2$
D $1.0\times10^{10}$

Step-by-Step Verified Solution

We know, from Nernst Equation E cell = E o cell - 2.303 R T n F log 10 K At equilibrium E cell = 0 _ 0 = E o cell - 2.303 _ 8.314 _ 298 2 _ 96500 log 10 K _ 0 = 0.295 - 2.303 _ 8.314 _ 298 2 _ 96500 log 10 K _ 0.295 = 0.0591 2 log 10 K _ log 10 K = 10 _ K = 1 _ 10 10

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