Home
Class 11
CHEMISTRY
E(Mn^(3+)//Mn^(2+))^@is highly positive ...

`E_(Mn^(3+)//Mn^(2+))^@`is highly positive than that of `E_(Cr^(3+)//Cr^(2+))^@orE_(Fe^(3+)//Fe^(2+))^@` because

Text Solution

Verified by Experts

Much larger third ionisation energy of Mn (change from `3d^(5)` to `3d^(4)`) is responsible for hits. This also explains why the +3 state of Mn is of little importance.
Promotional Banner

Topper's Solved these Questions

  • D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS

    RESONANCE ENGLISH|Exercise Exercise 2|40 Videos

  • D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS

    RESONANCE ENGLISH|Exercise Exercise 3|65 Videos

  • D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS

    RESONANCE ENGLISH|Exercise Match the column|1 Videos

  • CHEMICAL EQUILIBRIUM

    RESONANCE ENGLISH|Exercise Advanced Level Problems (Part-3)(Stage-5)|2 Videos

  • GASEOUS STATE

    RESONANCE ENGLISH|Exercise ORGANIC CHEMISTRY(Hydrocarbon)|18 Videos

Similar Questions

Explore conceptually related problems

E^(0)_(Mn_(3+)/Mn_(2+)) , is highly positive due to

How would you account for the following? (i)The atomic radii of the metals of the third (5d) series of transition elements are virtually the same as those of the corresponding members of the second (4d) series. (ii)The E^(@) value for the Mn^(3+)//Mn^(2+) couple is much more positive than that for Cr^(3+)//Cr^(2+) couple or Fe^(3+)//Fe^(2+) couple. (iii)The highest oxidation state of a metal is exhibited in its oxide or fluoride.

Why is the value for (Mn^(3+))/(Mn^(2+)) couple much more positive than that for (Cr^(3+))/(Cr^(2+)) or (Fe^(3+))/(Fe^(2+)) ? Explain

Show that E_(Fe^(+3)//Fe^(+2))^(@) =3E_(Fe^(+3)//Fe)^(@)-2E_(Fe^(+2)//Fe)^(@)

Explain why E^(@) for Mn^(3+)//Mn^(2+) couple is more positive than that for Fe^(3+)//Fe^(2+) (At. Nos. Mn=25,Fe=26)?

Give reason for the folloiwng : (a) E_("value")^(@) for Mn^(3+)//Mn^(2+) couple is much more positive than that of Fe^(3+)//Fe^(2+) couple. (b) Sc^(3+) is colourless in aqueous solution whereas Ti^(3+) is coloured.

(i) On the basis of the standard electrode potential values stated for acid solutions, predict whether Ti^(4+) species may be used to oxidise Fe(II) to Fe(III) {:(Ti^(4+) + e^(-) to Ti^(3+), E^(@) = +0.01V), (Fe^(3+) + e^(-) to Fe^(2+), E^(@)= +0.77V):} (ii) Based on the data arrange Fe^(3+), Mn^(2+) " and " Cr^(2+) in the increasing order of stability of +2 oxidation state. (Give a brief reason) E_(Cr^(3+)//Cr^(2+))^(@) = -0.4V E_(Mn^(3+)//Mn^(2+))^(@) = +1.5V E_(Fe^(3+)//Fe^(2+))^(@) = +0.8V

Assertion: E^(@) for Mn^(3+)//Mn^(2+) is more positive than Cr^(3+)//Cr^(2+) Reason: The third ionisation energy of Mn is larger than that of Cr .

Calculate the e.f.m of the cell Cr|Cr^(3+)(0.1M)||Fe^(2+)(0.01M)|Fe [given that E_(Cr^(3+)//Cr)^(@)=-0.75,E_(Fe^(2+)//Fe)^(@)=-0.45V]

Given E_("Cr_(2)O_(7)^(2-)//Cr^(3+))^(@)=1.33V,E_(MnO_(4)^(-)//Mn^(2+))^(@)=1.51V Among the following, the strongest reducing agent is E_(Cr^(3+)//Cr)^(@)=-0.74V^(x),E_(MnO_(4)^(-)//Mn^(2+))^(@)=1.51V E_(Cr_(2)O_(7)^(2-)//Cr^(3+))^(@)=1.33V,E_(Cl//Cl^(-))^(@)=1.36V Based on the data given above strongest oxidising agent will be

RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. What is the most common oxidation state of first transition series?

    Text Solution

    |

  2. Name the three factors which determine the stability of a particular ...

    Text Solution

    |

  3. E(Mn^(3+)//Mn^(2+))^@is highly positive than that of E(Cr^(3+)//Cr^(2+...

    Text Solution

    |

  4. Use the data to answer the following and also justify giving rason: {:...

    Text Solution

    |

  5. Which of the following ions would form (i) coloured and (ii) colourles...

    Text Solution

    |

  6. Why Ti^(+4) complex are diamagnetic?

    Text Solution

    |

  7. A substance is found to have a magnetic moments of 3.9BM.How many unpa...

    Text Solution

    |

  8. Explain giving reasons: (i) Transition metals and many of their compou...

    Text Solution

    |

  9. Describe The general characteristics of transition elements with speci...

    Text Solution

    |

  10. Which type of reaction MnO(4)^(2-)show with acid , dilute -alkali or w...

    Text Solution

    |

  11. Why is KMnO4 kept in dark bottles ?

    Text Solution

    |

  12. Why does AgNO(3) produced a black stain on the skin?

    Text Solution

    |

  13. Why is AgBr used in photography ?

    Text Solution

    |

  14. Why it is not advisable to dissolve KMnO(4) in cold and concentrated H...

    Text Solution

    |

  15. What happen when: (a) Green Vitriol is strongly heated. , (b) FeSO(4)...

    Text Solution

    |

  16. State true or false: Reaction of K(2)Cr(2)O(7) with cold and concentra...

    Text Solution

    |

  17. Write balanced chemical equations for: (i) Mixture of K(2)Cr(2)O(7) ...

    Text Solution

    |

  18. What are inner transition elements? Decide which of the following atom...

    Text Solution

    |

  19. Actinoid contraction is greater from element to element than lanthanoi...

    Text Solution

    |

  20. The chemistry of the actinoid elements is not so smooth as that of the...

    Text Solution

    |