Home
Class 12
CHEMISTRY
E^(@) for Fe//Fe^(2+) is +0.44 V and E^(...

`E^(@)` for `Fe//Fe^(2+)` is `+0.44 V` and `E^(@)` for `Cu//Cu^(2+)` is `-0.32 V`. Then, in the cell,

A

Cu oxidises `Fe^(2+)` ion

B

`Cu^(2+)` oxidises iron

C

Cu reduces `Fe^(2+)` ion

D

`Cu^(2+)` ion reduces Fe .

Text Solution

Verified by Experts

The correct Answer is:
B
Higher o.p `to` anode `to` oxidation take place .
`therefore` Lower o.p `to` cathode `to` Reduction take place .
`Fe + Cu^(2+) to Fe^(2+) + Cu`
`E_(cell)^(@) = E_(op(Fe))^(@) + E_(op(Cu))^(@)`
=`0.44 V + (0.32 V) ( therefore E_(Cu|Cu^(2+))^(@) = - E_(Cu^(2+)|Cu)^(@) )`
`=0.76 V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    NIKITA PUBLICATION|Exercise Questions From Competitive Exam|46 Videos

  • D-AND F-BLOCK ELEMENTS

    NIKITA PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS|515 Videos

  • GENERAL PRINCIPLES & PROCESSES OF ISOLATION OF ELEMENTS

    NIKITA PUBLICATION|Exercise Multiple choice questions|117 Videos

Similar Questions

Explore conceptually related problems

E^(@) of Fe^(2 +) //Fe = - 0.44 V, E^(@) of Cu //Cu^(2+) = -0.34 V . Then in the cell

Standard E^0 of the half cell Fe | Fe^(2+) is +0.44V and standard E^0 of half cell Cu|Cu^(2+) is -0.32V ,then

The E^(o) for half cells Fe//Fe^(2+) and Cu//Cu^(2+) are –0.44 V and +0.32 V respectively. Then which of these is true?

If e_(Fe^(2+) //Fe)^@ =- 0. 44 1V . And E_(Fe^(3+)//Fe^(2+))^(o) = 0. 771 V . The standard emf of the reaction Fe +2 Fe^(3+) rarr 3Fe^(2+) will be .

For the disproportion of copper: 2 Cu^(+) to Cu^(+2) + Cu E^(0) is :- Given E^(0) for Cu^(+2)//Cu is 0.34 V & E^(0) for Cu^(+2)//Cu^(+) is 0.15 V:

Standard electrode potentials are Fe^(2+)//Fe, E^(@) = -0.44 V Fe^(3+)//Fe^(2+), E^(@) = -0.77 V If Fe^(3+), Fe^(2+) , and Fe block are kept together, then

The standard reduction potential data at 25^(@)C is given below E^(@) (Fe^(3+), Fe^(2+)) = +0.77V , E^(@) (Fe^(2+), Fe) = -0.44V , E^(@) (Cu^(2+),Cu) = +0.34V , E^(@)(Cu^(+),Cu) = +0.52 V , E^(@) (O_(2)(g) +4H^(+) +4e^(-) rarr 2H_(2)O] = +1.23V E^(@) [(O_(2)(g) +2H_(2)O +4e^(-) rarr 4OH^(-))] = +0.40V , E^(@) (Cr^(3+), Cr) =- 0.74V , E^(@) (Cr^(2+),Cr) = - 0.91V , Match E^(@) of the redox pair in List-I with the values given in List-II and select the correct answer using the code given below teh lists: {:(List-I,List-II),((P)E^(@)(Fe^(3+),Fe),(1)-0.18V),((Q)E^(@)(4H_(2)O hArr 4H^(+)+4OH^(+)),(2)-0.4V),((R)E^(@)(Cu^(2+)+Curarr2Cu^(+)),(3)-0.04V),((S)E^(@)(Cr^(3+),Cr^(2+)),(4)-0.83V):} Codes:

If E_(Fe^(2+)//Fe)^(@)=-0.440 V and E_(Fe^(3+)//Fe^(2+))^(@)=0.770 V , then E_(Fe^(3+)//Fe)^(@) is -

NIKITA PUBLICATION-ELECTROCHEMISTRY -Questions From Competitive Exam
  1. Consider the following relations for emf of a electrochemical cell (...

    Text Solution

    |

  2. The equilibrium constant (K) for the reaction Cu(s)+2Ag^(+) (aq) rar...

    Text Solution

    |

  3. E^(@) for Fe//Fe^(2+) is +0.44 V and E^(@) for Cu//Cu^(2+) is -0.32 V....

    Text Solution

    |

  4. For the electrochemical cell, M|M^(+) ||X^(-)|X, E(M^(+)//M)^(@) = 0.4...

    Text Solution

    |

  5. Match the followings . {:(,"List - I" ,, ,"List- II") , (,(A) "Poten...

    Text Solution

    |

  6. If values of Lambda(0) of NH(4)Cl , NaOH and NaCl are 130 , 127 and 10...

    Text Solution

    |

  7. Standard electrode potential of three metal X, Y and Z are -1.2 V, +0....

    Text Solution

    |

  8. The electrode pptenticals for Cu^(2+) (aq) +e^(-) rarr Cu^+ (aq) ...

    Text Solution

    |

  9. Standard electrode potential for Sn^(4+)//Sn^(2+) couple is 0.15 V and...

    Text Solution

    |

  10. If E(cell)^(ɵ) for a given reaction is negative, which gives the corre...

    Text Solution

    |

  11. Limiting molar conductivity of NH(4)OH [i.e., Lambda(m)^(@)(NH(4)OH)] ...

    Text Solution

    |

  12. The reduction potential of hydrogen half cell will be negative if :

    Text Solution

    |

  13. Resistance of 0.2 M solution of an electrolyte is 50 Omega. The specif...

    Text Solution

    |

  14. AgNO(3)(aq.) was added to an aqeous KCl solution gradually and the con...

    Text Solution

    |

  15. Consider the following cell reaction. 2Fe(s)+O(2)(g)+4H^(+)(aq)rarr2...

    Text Solution

    |

  16. A solution contains Fe^(2+), Fe^(3+) and T^(-) ions. This solution was...

    Text Solution

    |

  17. The ionic conductance of Ba^(2+) and Cl^(-) respectively are 127 and 7...

    Text Solution

    |

  18. What volume of O(2) at NTP liberated by 5 A current flowing for 193 a...

    Text Solution

    |

  19. Find E(cell)^(@) for the cell : Zn | Zn^(2+)(1M) || Ag^(+)(1M) | Ag ...

    Text Solution

    |

  20. The number of moles of electrone required to deposits 36 g of Al from ...

    Text Solution

    |