InterviewSolution
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InterviewSolution
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`E_(1),E_(2) and E_(3)` the emf values of the three galvanic cells respectively. (i) `Zn|Zn_(0.1M)^(2+)||Cu_(0.1M)^(2+)|Cu`, (ii) `Zn|Zn_(0.1M)^(2+)||Cu_(0.1M)^(2+)|Cu` ltBrgt (iii) `Zn|Zn_(0.1M)^(2+)||Cu_(0.1M)^(2+)|Cu` Which one of the following is trueA. `E_(2) gt E_(3) gt E_(1)`B. `E_(3) gt E_(2) gt E_(1)`C. `E_(1) gt E_(2) gt E_(3)`D. `E_(1) gt E_(3) gt E_(2)` |
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Answer» Correct Answer - B E.m.f. of the cell`=E_(cell)^(o)-(0.0591)/(n)log_(10)[(Zn^(2+))/(Cu^(2+))]` Higher the `([Zn^(2+)])/([Cu^(2+)])` ratio lower is the e.m.f. of cell. (i) `"log"[(Zn^(2+)])/([Cu^(2+)])=10," "(ii)" log"([Zn^(2+)])/([Cu^(2+)])=1` (iii) `"log"([Zn^(2+)])/([Cu^(2+)])=0.1` So is `E_(3) gt E_(2) gt E_(1)`. |
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