Home
Class 12
CHEMISTRY
E^(@) values of Mg^(2+) //Mg is -2.37V, ...

`E^(@)` values of `Mg^(2+) //Mg` is -2.37V, of `Zn^(2+)//Zn` is -0.76V and `Fe^(2+) //Fe` is -0.44V.
Which of the following statement is correct ?

A

`Mg oxidises Fe`

B

`Zn oxidises Fe`

C

`Zn reduces Mg^(2+)`

D

`Zn reduces Fe^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • COORDINATION COMPOUNDS

    MBD PUBLICATION|Exercise QUESTION BANK|914 Videos

  • ENVIRONMENTAL CHEMISTRY

    MBD PUBLICATION|Exercise QUESTION BANK|299 Videos

Similar Questions

Explore conceptually related problems

For the cell prepared from electrode A and B: Electrode A:Cr_2O_7^(2-)|Cr^(3+),E_(red)^@ =+1.33 V and Electrode B:Fe^(3+) / Fe^(2+),E_(red)^@=0.77 V. Which of the following statements are correct :

Given the standard electrode potentials, K^(+) // K = - 2.93 V, Ag^(2+) //Ag = 0.80 V Hg^(2+) //Hg = 0.79 V , Mg^(2+) //Mg = - 2.37 V, Cr^(3+) //Cr = - 0.74 V Arrange these metals in their increasing order of reducing power.

E^@ for Fe^(2+) +2e rarrFe is -0.44 volt and E^@ for Zn^(2+) +2e rarrZn is -0.76 volt thus:

What does the negative sign in the expression E_(Zn^(2+) //Zn)^(@) = -0.76V mean ?

Consider the standard potential of the following cells, (i) Mg^(2+) +2e rarr Mg,E^@=-2.37V (ii) Zn^(2+) + 2erarrZn,E^@ =-0.76V (iii) Ni^(2+) +2e rarrNi,E^@=-0.25V (iv) Fe^(3+) + 3e rarrFe, E_0=-0.04 V find the strongest reducing agent :

MBD PUBLICATION-ELECTROCHEMISTRY-QUESTION BANK
  1. The emf of the cell involving following changes Zn(s)+Ni^(2+)(1M)rarrZ...

    Text Solution

    |

  2. A current of 2.6 ampere was passed through CuSO4 solution for 380 sec....

    Text Solution

    |

  3. E^(@) values of Mg^(2+) //Mg is -2.37V, of Zn^(2+)//Zn is -0.76V and F...

    Text Solution

    |

  4. On passing electricity through diluteH2SO4 solution the amount of subs...

    Text Solution

    |

  5. Passage of 96500 coulmb of electricity liberates…….. Litre of O2 at NT...

    Text Solution

    |

  6. During electrolysis of an aqueous solution of Cu^(2+) sulphate , 0.635...

    Text Solution

    |

  7. The number of electrons involved in redox reactions when a faraday of ...

    Text Solution

    |

  8. If Mg^(2+) +2e rarrMg(s), E=-2.37 V, Cu^(2+) + 2e rarrCu(s),E=+0.34V ...

    Text Solution

    |

  9. A certain quantity of electricity is passed through aqueous solution o...

    Text Solution

    |

  10. Which is correct representation for a cell at equilibrium:

    Text Solution

    |

  11. Out of Cu,Ag,Fe and Zn the metal which can displace all other from the...

    Text Solution

    |

  12. The thermodynamic efficiency of cell is given by :

    Text Solution

    |

  13. In which of the following will the corrosion of iron be most rapid :

    Text Solution

    |

  14. In a concentration cell:

    Text Solution

    |

  15. The electrolytic bath used in gold plating of copper articles contains...

    Text Solution

    |

  16. If the cell reactin is spontaneous then :

    Text Solution

    |

  17. The cell reaction ,Zn + Cu^(2+)rarrZn^(2+) +Cu is best represented by ...

    Text Solution

    |

  18. Mobility of H^+(in aq medium) is high because:

    Text Solution

    |

  19. A cell with two electrodes, one of grey tin and the other white tin, ...

    Text Solution

    |

  20. An ion is reduced to element when it absorbs 6xx 10 ^20 electrons. The...

    Text Solution

    |