Leaching Reagents and Techniques MCQ

Test your knowledge with important Leaching Reagents and Techniques MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Leaching Reagents and Techniques MCQs at Bissoy

• What is the advantage of using percolation leaching technique?
  ক

  Batches are identical

  খ

  Less water is used

  গ

  High Operational flexibility

  ঘ

  Low Operational flexibility
• In which type of leaching, the ores are left exposed to atmospheric moisture?
  ক

  In situ leaching

  খ

  Heap leaching

  গ

  Agitation leaching

  ঘ

  Percolation leaching
• In situ leaching is direct leaching of the ore deposits.
  ক

  True

  খ

  False
• In which leaching technique, stirring is used to help the dissolution process?
  ক

  Agitation leaching

  খ

  Dump leaching

  গ

  Heap leaching

  ঘ

  Percolation leaching
• Which of the following is not a leaching technique?
  ক

  In situ leaching

  খ

  Heap leaching

  গ

  Dump leaching

  ঘ

  Dissolution leaching
• Why is the preliminary grinding for the leaching process done in the presence of water?
  ক

  To change its state

  খ

  To accelerate the grinding process

  গ

  To reduce dust losses

  ঘ

  To obtain large chunks of ore
• What is the result of ammonia leaching?
  ক

  Acid

  খ

  Base

  গ

  Insoluble solid phase

  ঘ

  Complex ion
• Which of the following situation of acid will attack strongly on the ores and minerals during the leaching process?
  ক

  Concentrated

  খ

  Dilute

  গ

  Cold

  ঘ

  Reddish colour
• It is very difficult to dissolve CuSO4 in water.
  ক

  True

  খ

  False
• Which of the following can be used as a leaching reagent?
  ক

  Wax

  খ

  Carbon electrode

  গ

  Acids

  ঘ

  Glass
• Which of the following process is not done for the separation of leach liquor?
  ক

  Electrolysis

  খ

  Washing

  গ

  Filtration

  ঘ

  Settling
• What is the process called in which the desirable elements are dissolved in a reagent selectively, during a hydrometallurgy process?
  ক

  Leaching

  খ

  Lynching

  গ

  Leach liquoring

  ঘ

  Separation of leach liquor
• Which of the following factors is not necessary while choosing a suitable leaching reagent?
  ক

  Cost of reagent

  খ

  Regeneration ability of reagent

  গ

  Corroding properties of the reagent

  ঘ

  Colour of reagent
• Why are the ores crushed and ground before reacting it with leaching reagents?
  ক

  To reduce the surface area of particles

  খ

  To increase the surface area of particles

  গ

  To reduce the reaction rate

  ঘ

  To increase the number of particles