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. Minimum reflux ratio in a distillation column results in_____________________?

   A. Optimum number of trays
   B. Minimum reboiler size
   C. Maximum condenser size
   D. Minimum number of trays

6. Steady state equimolal counter diffusion is encountered in_____________________?

   A. Separation of a binary mixture by distillation
   B. Absorption of NH3 from air by water
   C. All liquid-liquid diffusion systems
   D. All liquid-solid diffusion systems

7. Relative volatility does not change appreciably with the change in_____________________?

   A. Temperature
   B. Vapour pressure of either component
   C. Total pressure
   D. None of these

8. With increase in temperature, the leaching rate increases because of the _____________________?

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

9. With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system) ?

   A. Increases
   B. Decreases
   C. Remain unaffected
   D. Increases Linearly

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

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