Home
Class 12
CHEMISTRY
Aluminium containing alumina as impurity...

Aluminium containing alumina as impurity can be refined by poling or not. Why?

Text Solution

Verified by Experts

Aluminium containing alumina cannot be refined by poling. Aluminium is more electropositive, thus hydrocarbons released from green wood poles and carbon cannot reduce alumina.
Promotional Banner

Topper's Solved these Questions

  • PRINCIPLES OF METALLURGY

    AAKASH SERIES|Exercise SUBJECTIVE EXERCISE-2 ( SHORT ANSWER QUESTIONS )|8 Videos

  • PRINCIPLES OF METALLURGY

    AAKASH SERIES|Exercise SUBJECTIVE EXERCISE-2 ( VERY SHORT ANSWER QUESTIONS )|19 Videos

  • PRINCIPLES OF METALLURGY

    AAKASH SERIES|Exercise Objective exercise -4 (Assertion (A) & Reason (R) type questions :|39 Videos

  • PRACTICAL CHEMISTRY

    AAKASH SERIES|Exercise PRACTICE SHEET-5 (Integer answer Type questions)|6 Videos

  • PROTEINS AND NUCLEIC ACIDS

    AAKASH SERIES|Exercise PRACTICE SHEET - 4|30 Videos

Similar Questions

Explore conceptually related problems

Silver containing lead as an impurity is purified by

Tin and lead can be refined by

Tin and lead can be refined by

Silver containing lead as an impurity is removed by

Thin and lead can be refined by

Silver containing lead as an impurity is not purified by

Impure glycerine can be purified by

Sugar containing an impurity of common salt can be purified by crystallisation from

AAKASH SERIES-PRINCIPLES OF METALLURGY-PROBLEMS
  1. Graphite rods are frequently replaced in HallHeroult's process of extr...

    Text Solution

    |

  2. In moist air copper corrodes to produce a green layer on the surface....

    Text Solution

    |

  3. Metal sulphides occur mainly in rocks, but metal halides occur in lake...

    Text Solution

    |

  4. Why is the reduction of a metal oxide if the metal formed is in liquid...

    Text Solution

    |

  5. The value of DeltafG^(Theta) for formation of Cr2 O3 is – 540 kJ "mo...

    Text Solution

    |

  6. Reduction of metal sulphides directly with carbon is not possible. Why...

    Text Solution

    |

  7. Eventhough reduction of magnesia with aluminium is thermodynamically f...

    Text Solution

    |

  8. Aluminium containing alumina as impurity can be refined by poling or n...

    Text Solution

    |

  9. The choice of a reducing agent in the extraction of a particular case...

    Text Solution

    |

  10. Hydrogen is a common reductant of organic chemicals, but it is not ...

    Text Solution

    |

  11. Although thermodynamically feasible, in practice alumina is not reduce...

    Text Solution

    |

  12. Reduction of metal oxides by thermit process becomes faster just af...

    Text Solution

    |

  13. Out of coke and carbonmonoxide, which is a better reducing agent for i...

    Text Solution

    |

  14. Both coke and lime stone are used in smelting of iron ore. Why?

    Text Solution

    |

  15. To precipitate silver from sodium argento-cyanide, aluminium can be us...

    Text Solution

    |

  16. For precipitation of silver from the complex [Ag(CN)(2) ]^(-) , zinc ...

    Text Solution

    |

  17. At a site, low grade copper ores are avilable and Zinc and iron scrap...

    Text Solution

    |

  18. Electrolysis of aqueous alkali metal chloride does not liberate metal...

    Text Solution

    |

  19. How is a mixture of oxides of Aland Fe separated ?

    Text Solution

    |

  20. Graphite rods are frequently replaced in Hall-Heroult's process of ex...

    Text Solution

    |