A. Agitation
B. Temperature
C. Particle size
D. None of these
Related Mcqs:
- 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. - 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. - 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. - With increase in temperature, the rate of leaching increases, because the___________________?
A. Diffusivity of solute increases
B. Viscosity of solvent decreases
C. Thermal conductivity of solute increases
D. None of these - With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system) ?
A. Increases
B. Decreases
C. Remain unaffected
D. Increases Linearly - Rate of leaching increases with increasing______________________?
A. Temperature
B. Viscosity of solvent
C. Pressure
D. Size of the solid - Coffee is prepared from coffee beans by leaching with____________________?
A. Cold water
B. Hot water
C. Dilute hot caustic solution
D. Naphtha - Leaching of uranium ore and gold ore is done in________________________?
A. Centrifugal extractor
B. Pachuca tanks
C. Bollman extractor
D. None of these - 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 - Pick out the wrong statement pertaining to leaching ?
A. Fine solids cannot be leached in a Pachuca tank
B. Door classifier can be used for leaching of coarse solids
C. Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
D. Very high temperature is not needed for the leaching of sugar beet
