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The emf of the following three galvanic ...

The emf of the following three galvanic cells are respresented by `E_(1), E_(2)` and `E_(3)` respectively.
Which of the following is correct?
(i) `Zn//Zn^(2+) (1M)// //Cu^(2+)(1M)//Cu`
(ii) `Zn//Zn^(2+) (0.1M)// //Cu^(2+)(1M)//Cu`
(iii) `Zn//Zn^(2+)(1M)// //Cu^(2+)(0.1M)//Cu`

A

`E_(1) gt E_(2) gtE_(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)`

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-ELECTROCHEMISTRY -Exercise -2 (Nernst equation and EMF)
  1. EMF of a cell in terms of reduction potential of its left and right el...

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  2. E^(0) for the half cell Zn^(2+) // Zn is - 0.76 V . Emf of the cell ...

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  3. If the standard electrode protential of Cu^(2+)// Cu electrode is 0.34...

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  4. The potential of hydrogen electrode is -118 mV . The H^(+) concentrati...

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  5. The standard potential (E^(0)) for the half reaction are as Zn to Zn^...

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  6. E^(0) for F2 + 2e^(-) to 2F^(-) is 2.8 V , E^(0) for 1//2 F2 + e^(-) ...

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  7. Consider the following E^(0) values E(Fe^(3+) // Fe^(2+))^(0) = + 0.77...

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  8. E^(0) for the reaction Fe + Zn^(2+) to Zn + Fe^(2+) is -0.35 V . The ...

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  9. E.M.F of the cell reaction , 2Ag^(+) + Cu to 2Ag + Cu^(2+) is 0.46 V ...

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  10. The EMF of the cell Ni//Ni^(2+)(0.01)// // Cl^(-)(0.01M)//Cl(2), pt i...

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  11. The standard electrode potential of the htwo half cells are given bel...

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  12. Aluminium displaces hydrogen from dilute HCl whereas silver does not. ...

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  13. A cell constructed by coupling a standard copper electrode and a stand...

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  14. The solution of nickel sulphate in which nickel rod is dipped is dilut...

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  15. The standard reduction potentials for the two half-cell reactions are ...

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  16. Normal aluminium electrode coupled with normal hydrogen electrode give...

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  17. The standard EMF for the cell reaction , Zn + Cu^(2+) to Cu + Zn^(2+) ...

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  18. At a certain temperature and at infinite dilution, the equivalent cond...

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  19. The emf of the following three galvanic cells are respresented by E(1)...

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