Home
Class 12
CHEMISTRY
E0 values of Zn^(2+), Zn , Mg^(2+), Mg ...

`E_0` values of `Zn^(2+), Zn , Mg^(2+), Mg and Cu^(2+), Cu` are `-0.76 V, -2.36 and 0.34 V` respectively.
(a) Which metal can be extracted even from its aqueous solutions by electrolysis ?
(b) Which metal acts as best reductant ? Write reactions .

Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    AAKASH SERIES|Exercise LEVEL-I ( EXERCISE-I)|146 Videos

  • ELECTROCHEMISTRY

    AAKASH SERIES|Exercise LEVEL-I ( EXERCISE-II)|51 Videos

  • ELECTROCHEMISTRY

    AAKASH SERIES|Exercise EXERCISE - 4.1.5|3 Videos

  • DILUTE SOLUTIONS

    AAKASH SERIES|Exercise EXERCISE - 1.2|55 Videos

  • ELEMENTS OF D - BLOCK

    AAKASH SERIES|Exercise EXERCISE - 5.2|33 Videos

Similar Questions

Explore conceptually related problems

E^@ of In^(3+), In^(+) and Cu^(2+)m Cu^(+) are -0.4 V and -0.42 V respectively, Calculate the equilibrium constant for the reaction. In^(2+) + Cu^(2+) to In^(3+) + Cu^(+) at 25^@C .

E^@ values of Zn^(2+), Zn and Cu^(2+), Cu are respectively -0.76 V and + 0.34 . Calculate the EMF of the cell Zn//Zn^(2+) (0.1M)"//"Cu^(2+)(0.1 M)//Cu .

The standard reduction potential of Cu^(2+) // Cu and Cu^(+) // Cu are 0.337 and 0.153 V respectively . The standard electrode poetential of Cu^(2+) // Cu^(+) half cell will be

The S.R.Ps of Cu^(2+) // Cu , Hg^(2+)//Hg and Zn^(2+)//Zn are respectively 0.34 V , 0.85 V and -0.76 V . The wrong statement is

E^@ for Mg to 2e^(-) + Mg^(2+) is + 2.37 V and for Cu to 2e^(-) + Cu is -0.34V . What will be the standard potential of cell constructed with these electrodes ? Which electrode will be positive terminal to draw the current?

Which of following metal is extracted by the electrolysis of its salt in molten state (a) Na, (b) Mg, (c) Al, (d) Fe, (e) Ag The correct answer is

AAKASH SERIES-ELECTROCHEMISTRY -EXERCISE - 4.2
  1. Certain quantity of electricity is passed through aqueous AgNO3 and aq...

    Text Solution

    |

  2. Potential of normal calomel electrode is -0.28 V . The emf of cell obt...

    Text Solution

    |

  3. The standard potential of Ni^(2+), Ni is -0236 V. It this electrode is...

    Text Solution

    |

  4. The oxidation power of halogens and the reducing power of halides is j...

    Text Solution

    |

  5. E0 for the reaction , Ag^(+) + e^(-) to Ag, is 0.8 V. Calculate E^@ f...

    Text Solution

    |

  6. Standard oxidation potential of iron electrode is + 0.44 V. Calculate ...

    Text Solution

    |

  7. Colour of potassium iodide solution containing starch turns blue when ...

    Text Solution

    |

  8. E0 values of Zn^(2+), Zn , Mg^(2+), Mg and Cu^(2+), Cu are -0.76 V, ...

    Text Solution

    |

  9. At 298 K the equilibrium constant for the redox reaction CuSO4 + Fe <...

    Text Solution

    |

  10. Ag^(+) + e^(-) rarr Ag, E^(0) = + 0.8 V and Zn^(2+) + 2e^(-) rarr Zn, ...

    Text Solution

    |

  11. E^@ value for Fe^(3+) 3e^(-) to Fe and Fe^(2+) + 2e^(-) to Fe are -0.0...

    Text Solution

    |

  12. The EMI of the cell Pt, H(2)(2 atm) |HCl (1M)|H2(10 atm),Pt is xV and...

    Text Solution

    |

  13. At 25^@C the EMF of the cell Zn, ZnSO4"//"CuSO4, Cu is 0.03V. The tem...

    Text Solution

    |

  14. The molar conductivity of 0.025mol L^(-1) methanoic acid is 46.1 S cm^...

    Text Solution

    |

  15. E("cell") for the reaction Pt , H2 (1atm)//H^(+) (1M)"//" C6H)5NH3Cl (...

    Text Solution

    |

  16. At 25^@C potential of the cell, Pt, H2(g), HCl (aq)"//"AgCl(s), Ag(s) ...

    Text Solution

    |

  17. When salt is spread on a road during winter, corrosion of motor cars i...

    Text Solution

    |

  18. E^(0) = -08275V for the reaction, 2H2O + 2e^(-) to 2OH^(-) + H(2).Calc...

    Text Solution

    |

  19. E^(0) of silver electrode is 0.8 V and solubility product of Agl is 1 ...

    Text Solution

    |

  20. The cell in which the following reaction occurs: 2Fe^(3+)(aq) + 2I^(...

    Text Solution

    |