Leaching of uranium ore and gold ore is done in________________________?

Related Mcqs:

1. Leaching of uranium ore and gold ore is done in_____________________?

   A. Centrifugal extractor
   B. Pachuca tanks
   C. Bollman extractor
   D. None of these

2. The ‘shanks system’ of leaching (i.e., counter-current multiple contact leaching) is used for____________________?

   A. Recovery of tannis from the tree barks and woods
   B. Leaching sodium nitrate from Chilean nitrate bearing rock
   C. Both A. and B.
   D. Neither A. nor B.

3. Leaching of coffee from coffee beans is done by___________________?

   A. Hot water
   B. Hexane
   C. Lime water
   D. Dilute H2SO4 (hot)

4. Leaching of sugar from sugar beets is done by___________________?

   A. Hot water
   B. Hexane
   C. Dilute H2SO4
   D. Lime water

5. Coffee is prepared from coffee beans by leaching with____________________?

   A. Cold water
   B. Hot water
   C. Dilute hot caustic solution
   D. Naphtha

6. With increase in temperature, the leaching rate increases due to__________________?

   A. Decreased liquid viscosity
   B. Increased diffusivity
   C. Both A. and B.
   D. Neither A. nor B.

7. For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a ____________ of the equilateral triangular co-ordinates?

   A. Binary mixture is represented by the apex
   B. Binary mixture is represented by any point inside
   C. Ternary mixture is represented by the sides
   D. Pure component is represented by the apex

8. For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a _______________ of the equilateral triangular co-ordinates?

   A. Binary mixture is represented by the apex
   B. Binary mixture is represented by any point inside
   C. Ternary mixture is represented by the sides
   D. Pure component is represented by the apex

9. Which of the following operations does not involve leaching ?

   A. Dissolving gold from ores
   B. Dissolving pharmaceutical products from bark or roots
   C. Dissolving sugar from the cells of the beet
   D. Removing nicotine from its water solution by kerosene

10. Degree of freedom for leaching and solvent extraction process is_____________________?

    A. 0
    B. 1
    C. 2
    D. 3