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
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. - Coffee is prepared from coffee beans by leaching with____________________?
A. Cold water
B. Hot water
C. Dilute hot caustic solution
D. Naphtha - 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. - Leaching of coarse solid lumps is also termed as _____________________?
A. Decoction
B. Dissolution
C. Percolation
D. Agitation and settling - Leaching of uranium ore and gold ore is done in_____________________?
A. Centrifugal extractor
B. Pachuca tanks
C. Bollman extractor
D. None of these - Leaching rate is independent of the________________?
A. Agitation
B. Temperature
C. Particle size
D. None of these - 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 - 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 - Rate of leaching increases with increasing______________________?
A. Temperature
B. Viscosity of solvent
C. Pressure
D. Size of the solid
