InterviewSolution
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InterviewSolution
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If `E_(1),E_(2)` and `E_(3)` are the emf values of the three galvanic cells respectivley (i)`Zn|Zn^(2+)(1M)||Cu^(2+)(0.1M)|Cu` (ii) `Zn|Zn^(2+)(1M)||Cu^(2+)(1M)|Cu` (iii) `Zn|Zn^(2+)(0.1)||Cu^(2+)(1M)|Cu`. Which one of the following is true.A. `E_(1) gt E_(2) gt E_(3)`B. `E_(3) gt E_(2) gt E_(1)`C. `E_(3) gt E_(1) gt E_(2)`D. `E_(2) gt E_(1) gt E_(3)` |
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Answer» Correct Answer - D Cell reaction is `Zn + Cu^(2+) to Zn^(2+) + Cu`. `E_("cell") = E_("cell")^(@) - (RT)/(nF) "ln" ([Zn^(2+)])/([Cu^(2+)])` Greater the factor `[Zn^(2+)] | [Cu^(2+)]` , less in the EMF . |
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