Related Questions

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 & B
D Neither A nor B
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
A Shift
B Sand wash
C Swell
D Scab
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)
A Increases
B Decreases
C Remains unaffected
D Increases Linearly
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
A Rigid
B Tough
C Ductile
D Plastic
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
A Sulphuric
B Hydrochloric
C Either A or 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
Degree of freedom for leaching and solvent extraction process is
A 1
B 3
C 0
D 2
The typical soil of tropical region, formed by the weathering of laterite rock, which promotes leaching of the soil is
A laterite soils
B black soil
C red and yellow soil
D peat and marshy soil
The leaching solvent used in Baeyer's process for the purification of bauxite is
A Ammonium hydroxide
B Sodium carbonate
C Sodium hydroxide
D Ammonium carbonate

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