Home
Class 12
CHEMISTRY
A: Bauxite is purified by leaching proce...

A: Bauxite is purified by leaching process
R: Aluminium oxide reacts with NaOH to form soluble sodium meta aluminate.

A

Hall's process

B

Baeyer's process

C

Serpeck's process

D

L.D. process

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
L.D process is steal making technique.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Statement-1: Hydrogen gas is liberated by the action of aluminium with a concentrated solution of NaOH Statement-2: Aluminium with NaOH forms sodium metaaluminate.

AlCl_(2) is soluble is axcess of NaOH forming sodium metaaluminate Na[Al(OH)_(4)] .

Assertion (A): Calcium and magnesium oxides are not reduced by carbon. Reason (R ): Calcium and magnesium oxides react with carbon to form their respected carbides.

Write the balanced chemical equation of the following word equation. Aluminium + sodium hydroxide + water to sodium meta aluminate + hydrogen

Write the balanced chemical equation of the following word equation. Aluminium sulphate + sodium hydroxide to sodium sulphate + sodium meta aluminate + water

Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following are true about slaking of lime and the solution formed? (i) It is an endothermic reaction. (ii) It is exothermic reation. (iii) The pH of the resulting solution will be more than seven. (iv) The pH of the resulting solution will be less than seven.

Statement-1 : Sodium meta aluminate on boiling with ammonium chloride produces white gelatinous precipitate. Statement-2 :Aluminium hydroxide is formed which is not soluble in water

Give balanced equations for the conversions – involved in the extraction of aluminium - Baeyer's process: Sodium aluminate to an insoluble hydroxide of aluminium.

Aluminium is extracted from bauxite by the electrolysis of aluminium oxide dissolved in cryolite. Now answer the following question: When bauxite is treated with sodium hydroxide solution, what happens to the aluminium oxide and iron (III) oxide?

Aluminium is extracted from bauxite by the electrolysis of aluminium oxide dissolved in cryolite. Now answer the following question: Name the process used for the purification of bauxite.

ALLEN-METALLURGY-EXERCISE-02
  1. From the following flowsheet for the extraction of pure metal, answer ...

    Text Solution

    |

  2. Of the following reduction processes, correct processes are :

    Text Solution

    |

  3. Consider the following steps: Cu(2)S overset("roast in air")rarr A o...

    Text Solution

    |

  4. Main source of lead is galena (PbS). It is converted to Pb by : S...

    Text Solution

    |

  5. Ag(2)S + NaCN rarr (A),(A) + Zn rarr (B) (B) is a metal. Hence, (A) ...

    Text Solution

    |

  6. The elemental phosphorus is made from rock phosphate, Ca(3)(PO(4))(2) ...

    Text Solution

    |

  7. A: Bauxite is purified by leaching process R: Aluminium oxide reacts ...

    Text Solution

    |

  8. The process which do use catalysts are

    Text Solution

    |

  9. Metallury involves steps :

    Text Solution

    |

  10. Which of the following metals is obtained by electrolytic reduction pr...

    Text Solution

    |

  11. Which of the following ore is/are oxide ore (s) ?

    Text Solution

    |

  12. Which of the following are correctly matched?

    Text Solution

    |

  13. In which of the following pair(s) the minerals are converted in to m...

    Text Solution

    |

  14. Tin stone (cassiterite) is purified by magnetic seperation method .Na...

    Text Solution

    |

  15. The reaction (s) which does (do) not occur in the reduction zone in ...

    Text Solution

    |

  16. Which of the following statements(s) is (are) true?

    Text Solution

    |

  17. The major role of flourspar (CaF(2)), which is added in small quantiti...

    Text Solution

    |

  18. Which of the followgin are correctly matched?

    Text Solution

    |

  19. Which of the following statements are correct in connection with the e...

    Text Solution

    |

  20. Which of the following does not disproportionate?

    Text Solution

    |