Home
Class 12
CHEMISTRY
Al(2)O(3) is reduced by electrolysis at ...

`Al_(2)O_(3)` is reduced by electrolysis at low potentials and high current. If `4.0 xx 10^(4)` amperes of currernt is passed through molten `Al_(2)O_(3)` for 6 hours, what mass of aluminium is produced? (Assume 100 % current efficiency, At. Mass of `Al = 27 u`)

A

`8.1 xx 10^(4)` g

B

`2.4 xx 10^(5)` g

C

`1.3 xx 10^(4)` g

D

`9.0 xx 10^(3)` g

Text Solution

Verified by Experts

The correct Answer is:
A
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

Al_2 O_3 is reduced by electrolysis at ow potentials and high currents, If 4.0 xx 10^(4) amperes of current is passed through molten Al_2O_3 fro 6 hours , what mass of alumininum is produced ? (Assume 100% current efficiency gt At mass of Al = 27 g "mol"^(-) ) .

A current of 0.5 amp is passed through excess of molten mixture of Al_(2)O_(3) and Na_(3)AlF_(6) for 9.65 hours. The mass of Al (in mg) deposited at the cathode, with (100/12)% current efficiency is (Al = 27).

One ampere of current is passed for 9650 seconds through molten AlCl_(3) What is the weight in grams of Al deposited at cathode? (Atomic weight of Al=27)

Knowledge Check

  • Al_(2)O_(3) is reduced by electrolysis at low potentials and high currents. If 4.0xx10^(4) ampere of current is passed through molten Al_(2)O_(3) for 6 hours, what mass of aluminium is produced ? (Assume 100% current efficiency. At. Mass of Al=27g mol^(-1) )

    A
    `8.1xx10^(4)g`
    B
    `2.4xx10^(5)g`
    C
    `1.3xx10^(4)g`
    D
    `9.0xx10^(3)g`

  • A1_(2)O_(3) is reduced by electrolysis at low potential and high current. If 4.0 xx 10^(4) amperes of current is passed through molten A1_(2)O_(3) for 6 hrs, what mass of aluminium is produced? (Assume 100% current efficiency)

    A
    `9.0xx10^(3)` g
    B
    `8.1xx 10^(4)` g
    C
    `2.4xx 10^(3)` g
    D
    `1.3 xx 10^(4)` g

  • AI_2O_3 is reduced by electrolysis at low potentials and high currents. If 4.0xx10^(4) amperes of current is passed through molten AI_2O_3 for 6 hours, what mass of aluminium is produced? (Assume 100% current efficiency, at mass of Al = 27 g mol^(-1) )

    A
    `8.1xx10^(4)` g
    B
    `2.4xx10^(5)` g
    C
    `1.3xx10^(4)` g
    D
    `9.0xx10^(3)` g
    • MODERN PUBLICATION-ELECTROCHEMISTRY -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) B MULTIPLE CHOICE QUESTIONS
    1. Al(2)O(3) is reduced by electrolysis at low potentials and high curren...

      Text Solution

      |

    2. The equilibrium constant of the following redox rection at 298 K is 1 ...

      Text Solution

      |

    3. The equivalent conductance of M//32 solution of a weak monobasic acid ...

      Text Solution

      |

    4. The solution of nickel sulphate in which nickel rod is dipped is dilut...

      Text Solution

      |

    5. For the reduction of silver ions with copper metal, the standard cell ...

      Text Solution

      |

    6. An increase in equivalent conductance of a strong electrolyte with dil...

      Text Solution

      |

    7. If the E(cell)^(@) for a given reaction has a positive value, then whi...

      Text Solution

      |

    8. The electrode pptenticals for Cu^(2+) (aq) +e^(-) rarr Cu^+ (aq) ...

      Text Solution

      |

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

      Text Solution

      |

    10. Limiting molar conductivity of NH(4)OH [i.e., Lambda(m)^(@)(NH(4)OH)] ...

      Text Solution

      |

    11. At 25^(@)C molar conductance of 0.1 molar aqueous solution of ammonium...

      Text Solution

      |

    12. A button cell used in watches functions as following Zn(s) + Ag 2 O(...

      Text Solution

      |

    13. A hydrogen gas electrode is made by dipping platinum wire in a solutio...

      Text Solution

      |

    14. When molten magnesium oxide was electrolysed for a certain period , 15...

      Text Solution

      |

    15. When 0.1 mol MnO(4)^(2-) is oxidized the quantity of electricity requi...

      Text Solution

      |

    16. The weight of silver (at wt. = 108)displaced by a quantity of electric...

      Text Solution

      |

    17. A device that convers energy of combustion of fueles like hydrogen and...

      Text Solution

      |

    18. The pressure of H(2) required to make the potential of H(2)-electrode ...

      Text Solution

      |

    19. The molar conductivity of a 0.5 mol//dm^(3) solution of AgNO(3) with e...

      Text Solution

      |

    20. During the electrolysis of molten sodium chloride, the time required t...

      Text Solution

      |