Home
Class 12
CHEMISTRY
Reduction potential for the following ha...

Reduction potential for the following half-cell reaction are
`Zn rarr Zn^(2+)+2e^(-),E_(Zn^(2+)//Zn)^(@) = -0.76V`
`Fe rarr Fe^(2+)+2e^(-),E_(Fe^(2+)//Fe)^(@) = -0.44V`
The emf for the cell reaction
`Fe^(2+) + Zn rarr Zn^(2+)+Fe`
will be

A

`-0.32V`

B

`+1.20 V`

C

`-1.20 V`

D

`+0.32 V`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • REDOX REACTIONS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - D|10 Videos

  • REDOX REACTIONS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - B|20 Videos

  • PRINCIPLES OF QUALITATIVE ANALYSIS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION H)|9 Videos

  • SOLUTIONS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGMENT (SECTION-J) AAKASH CHALLENGERS QUESTIONS|10 Videos

Similar Questions

Explore conceptually related problems

The standard oxidation potentials, , for the half reactions are as follows : Zn rightarrow Zn^(2+) + 2e^(-) , E^(@) = +0.76V Fe rightarrow Fe^(2+)+ 2e^(-), E^(@) = + 0.41 V The EMF for the cell reaction, Fe^(2+) + Zn rightarrow Zn^(2+) + Fe

The standard potential E^(@) for the half reactions are as : Zn rarr Zn^(2+) + 2e^(-), E^(@) = 0.76V Cu rarr Cu^(2+) +2e^(-) , E^(@) = -0.34 V The standard cell voltage for the cell reaction is ? Zn +Cu^(2) rarr Zn ^(2+) +Cu

The standard reductino potentials E^(c-) for the half reactinos are as follows : ZnrarrZn^(2+)+2e^(-)" "E^(c-)=+0.76V FerarrFe^(2+)+2e^(-) " "E^(c-)=0.41V The EMF for the cell reaction Fe^(2+)+Znrarr Zn^(2+)+Fe is

Standard oxidation potential for the following half-cell reactions are [Fe(s) rarr Fe^(2+)(aq) + 2e^(-) E^3 = +0.44 V] [Co(s)rarr Co^(3+) (aq) + 3e^(-) E^0 = - 1.81 V The standard emf of the cell reaction [3Fe(s) +2Co^(3+) (aq)rarr 3Fe^(2+) (aq) + 2Co(s)] , will be

Find the E_(cell)^(@) for the following cell reaction Fe^(+2)+Zn rarr Zn^(+2)+Fe Given E_(Zn//Zn^(+2))^(@)=0.76V,E_(Fe//Fe^(+2))^(@)=+0.41 V

The standard electrode potential of the half cells are given below : Zn^(2+)+ 2e^(-) rarr Zn(s), E^(o) = - 7.62 V Fe^(2+) + 2e^(-) rarr Fe(s) , E^(o) = -7 .81 V The emf of the cell Fe^(2+) + Zn rarr Zn^(2+) + Fe will be :

If E_(Fe^(2+))^(@)//Fe = -0.441 V and E_(Fe^(3+))^(@)//Fe^(2+) = 0.771 V The standard EMF of the reaction Fe+2Fe^(3+) rarr 3Fe^(2+) will be:

Given : E_(Fe^(3+)//Fe)^(@) = -0.036V, E_(FE^(2+)//Fe)^(@)= -0.439V . The value of electrode potential for the change, Fe_(aq)^(3+) + e^(-)rightarrow Fe^(2+) (aq) will be :

Given electrode potentials: Fe^(3+) + e^(-) rarr Fe^(2+) : E^(o) =0.771 V and I_(2) 2e^(-) rarr 2I^(-), E^(o) = 0.556 V then E^(o) for the cell reaction 2 Fe^(3+) 2I ^(-) rarr 2 Fe^(2+) + l_(2) will be:

Explain the following : Zinc displaces hydrogen from acid solution. E_(Zn^(2+)//Zn)^(Theta)= -0.76V

AAKASH INSTITUTE ENGLISH-REDOX REACTIONS-ASSIGNMENT SECTION - C
  1. In which of the following compounds, oxygen exhibits highest oxidation...

    Text Solution

    |

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

    Text Solution

    |

  3. Oxidation states of P in H(4)P(2)O(5),H(4)P(2)O(6),H(4)P(2)O(7) respec...

    Text Solution

    |

  4. Oxidation number of P in PO(4)^(3-), of S in SO(4)^(2-) and that of Cr...

    Text Solution

    |

  5. The number of moles of KMnO(4) that will be needed to react with one ...

    Text Solution

    |

  6. Standard reduction potentials of the half reactions are given below ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  9. In the reaction 2H(2)O(2) rarr 2H(2)O+O(2)

    Text Solution

    |

  10. Which change requires an oxidising agent?

    Text Solution

    |

  11. Given the following reaction involving A,B,C and D (i) C+B^(+)...

    Text Solution

    |

  12. Which element undergoes disproportionation in water ?

    Text Solution

    |

  13. Standard reduction potential at 25^(@)C of Li^(+)//Li,Ba^(+)//Ba,Na^(+...

    Text Solution

    |

  14. Which species is acting as a reducing agent in the following reaction ...

    Text Solution

    |

  15. The oxidant which cannot act as a reducing agent is

    Text Solution

    |

  16. Oxidation state of Fe in Fe(3)O(4) is

    Text Solution

    |

  17. Oxidation numbers of A, B, C are +2, +5 and -2 respectively. Possible ...

    Text Solution

    |

  18. The oxidation states of sulphur in the anions SO(3)^(2-), S(2)O(4)^(2-...

    Text Solution

    |

  19. Reduction potential for the following half-cell reaction are Zn rarr...

    Text Solution

    |

  20. In acidic medium, H(2)O(2) changes Ce(2)O(7)^(2-) to CrO(5) which has ...

    Text Solution

    |