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_(2)gtE_(3)gtE_(1)`B. `E_(3)gtE_(2)gtE_(1)`C. `E_(1)gtE_(2)gtE_(3)`D. `E_(1)gtE_(3)gtE_(2)`. |
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Answer» Correct Answer - B `Zn+Cu^(2+)rarrZn^(2+)+Cu` `E_("cell")=E_("cell")^(@)-(0.0591)/(2)"log"([Zn^(2+)])/([Cu^(2+)])` Lesser the `[Zn^(2+)]//[Cu^(2+)]` value more will be `E_("cell")` for (i) `([Zn^(2+)])/([Cu^(2+)])=(1)/(01)=10` for (ii) `([Zn^(2+)])/([Cu^(2+)])=(1)/(1)=1` and for (iii) `([Zn^(2+)])/([Cu^(2+)])=(01)/(1)=0.1` Hence `E_(3)gtE_(2)gtE_(1)` |
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