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Q.

In the electrochemical cell :

ZnZnSO4(0.01M)CuSO4(1.0M)Cu  the emf of this Daniel cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 changed to 0.01 M,the emf changes to E2 . From the following, which one is the relationship between E1 and E2
(Given, RT/F = 0.059)

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a

E1=E2

b

E2=0E1

c

E1>E2

d

E1<E2

answer is B.

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Detailed Solution

Ecell =Ecell °-0.059nlogZn2+Cu2+ E1=E°-0.0592log0.011 E1=E°-0.0592(-2)=E°+0.059 E2=E°-0.0592log10.01=E°-0.059  Hence, E1>E2
 

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