Home
Class 12
CHEMISTRY
Number of Faradays required to convert 1...

Number of Faradays required to convert 1 mol of `Cr_(2)O_(7)^(2-)` into `Cr^(3+)` ions is :

A

2

B

3

C

5

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
In acidic medium `Cr_(2) O_(7)^(2-) + 14 H^(+) + 6e^(-) to 2 Cr^(3+) + 7 H_(2)O`
Reduction of 1 mol of `Cr_(2) O_(7)^(2-)` to `Cr^(3+)` require = 6 F
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) C MULTIPLE CHOICE QUESTIONS|10 Videos

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) D MULTIPLE CHOICE QUESTIONS|12 Videos

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) (MULTIPLE CHOICE QUESTIONS )|35 Videos

  • D AND F-BLOCK ELEMENTS

    MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|12 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    MODERN PUBLICATION|Exercise COMPETION FILE (Integer Type Numerical Value Type Questions)|5 Videos

Similar Questions

Explore conceptually related problems

How many faradys are required to reduce one mole of Cr_(2)O_(7)^(-2)to Cr^(+3) ?

The charge required for the reduction of 1 mol Cr_(2)O_(7)^(2-) ions to Cr^(3+) is

The charge required for the reduction of 1 mole of Cr_(2)O_(7)^(2-) ions to Cr^(3+) is

How many moles of electrons are involved in the conversion of 1 mol Cr_(2)O_(7)^(2-) into Cr^(3+) ion? Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-) to 2Cr^(3+)+7H_(2)O

MODERN PUBLICATION-ELECTROCHEMISTRY -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) B MULTIPLE CHOICE QUESTIONS
  1. Two faraday of electricity is passed through a solution of CuSO(4). Th...

    Text Solution

    |

  2. Galvanization is applying a coating of :

    Text Solution

    |

  3. Number of Faradays required to convert 1 mol of Cr(2)O(7)^(2-) into Cr...

    Text Solution

    |

  4. Given E(Cl(2)//Cl^(-))^(@)=1.36V,E(Cr^(3+)//Cr)^(@)=-0.74V E("Cr(2)O...

    Text Solution

    |

  5. The standard oxidation potentials, , for the half reactions are as fo...

    Text Solution

    |

  6. At a particular temperature, the ratio of molar conductance to specifi...

    Text Solution

    |

  7. For a cell involving two electron change , E(cell)^(@) = 0.3 V at 25^...

    Text Solution

    |

  8. The charge required for the reduction of 1 mol of MnO(4)^(-) to MnO(2)...

    Text Solution

    |

  9. Consider the electrochemical reaction between Ag (s) and Cl(2) (g) ele...

    Text Solution

    |

  10. The conductivity of 0.1 mol L^(-1) KCl solution is 1.41 xx 10^(-3) S ...

    Text Solution

    |

  11. How long (approximate) should water be electrolysed by passing through...

    Text Solution

    |

  12. The pH of LHE in the following cell is : Pt, H(2)(1atm)|H^(o+)(x M)...

    Text Solution

    |

  13. 1 litre aqueous solution of NaCl was electrolysed bètweern Pt electrod...

    Text Solution

    |

  14. Two aqueous solutions A and B containing solute CuSO(4) and NaBr respe...

    Text Solution

    |

  15. Given E(Mn^(7+)//Mn^(2+))^(@) and E(Mn^(4+)//Mn^(2+))^(@) are 1.51 V a...

    Text Solution

    |

  16. Calculate EMF of following cell at 298 K Zn|ZnSO(4) (0.1 M) ||CuSO(4...

    Text Solution

    |

  17. The standard electrode potential E^(Theta) and its temperature coeffic...

    Text Solution

    |

  18. Calculate the standard cell potential (in V) of the cell in which foll...

    Text Solution

    |

  19. A solution of Ni(NO(3))(2) is electrolysed between platinum electrode...

    Text Solution

    |

  20. If the standed electrode potential for a cell is 2 V at 300 K, the equ...

    Text Solution

    |