InterviewSolution
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InterviewSolution
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Assertion: I Daniell cell, if concentrations of `Cu^(2+)` ions and `Zn^(2+)` ions are doubled, emf of the cell will be doubled. Reason: If concentration of ions in contact with the metal is doubled, the electrode potential is doubled.A. If both assertion and reason are true, and reason is the true explanation of the assertionB. if both assertion and reason are true, but reason is not the true explanation of the assertion.C. if assertion is true, but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - D Correct A. `Zn+Cu^(2+)toZn^(2+)+Cu,E_(cell)=E_(cell)^(@)-(RT)/(nF)"ln"([Zn^(2+)])/([Cu^(2+)])` Thus, if `[Zn^(2+)]` and `[Cu^(2+)]` are doubled, there is no effect of emf. Correct R. `Cu^(2+)+2e^(-)toCu,E=E^(@)-(RT)/(nF)"ln"(1)/([Cu^(2+)])` Thus, if `[C^(2+)]` is doubled, E is not doubled. |
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