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Q.

The standard EMF for the cell reaction, Zn+Cu2+⟶Cu+Zn2+ is 1.1 volt at 25∘C.The EMF for the cell reaction, when 0.1 M Cu2+ and 0.1 M Zn2+ solutions are used, at 250C is 

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a

0.10 V

b

– 0.110 V

c

1.10 V

d

– 1.10 V

answer is A.

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Detailed Solution

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The red-ox reaction is given as  Zn + Cu(0.1M)2+⇔Zn(o.1M)2+ + Cu  n=2  Ecell = Ecello-0.0591nlog [Zn+][Cu2+] Ecell= 1.1-0.0591nlog0.10.1 on solving  Ecell =1.1V

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