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Class 12ChemistryGeneral Principles and Processes of Isolation of ElementsConcentration
Easy

Froth floatation is based upon

  • A
    Specific gravity of ore particles
  • B
    Magnetic properties of ore particles
  • C
    Wetting properties of ore particles
  • D
    Electrical properties of ore particles
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Class 12 Questions

Class 12

Chemistry Questions

Chapter

General Principles and Processes of Isolation of Elements

Subtopic

Concentration

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Which of the ores mentioned in the table can be concentrated by the magnetic separation method?
Metal Ores and Composition
$Aluminium$ $Bauxite: AlO_{x}(OH)_{3-2x} (0 < x < 1)$; $Kaolinite: [Al_{2}(OH)_{4}Si_{2}O_{5}]$
$Iron$ $Haematite: Fe_{2}O_{3}$; $Magnetite: Fe_{3}O_{4}$; $Siderite: FeCO_{3}$; $Iron pyrites: FeS_{2}$
$Copper$ $Copper pyrites: CuFeS_{2}$; $Malachite: CuCO_{3} \cdot Cu(OH)_{2}$; $Cuprite: Cu_{2}O$; $Copper glance: Cu_{2}S$
$Zinc$ $Zinc blende or Sphalerite: ZnS$; $Calamine: ZnCO_{3}$; $Zincite: ZnO$

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Which of the following processes does not involve heating?

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Which of the following ores is best concentrated by the froth-flotation method?

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When $ZnS$ and $PbS$ minerals are present together,then $NaCN$ is added to separate them in the froth floatation process as a depressant,because

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During initial treatment,preferential wetting of ore by oil and gangue by water takes place in

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