Related Questions

Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when
A Extracting solvent is cheaply & abundantly available
B One of the liquid components is heat sensitive
C Viscosity of liquid components is very high
D One of the liquid components has very high affinity towards the solvent
In liquid extraction, if the selectivity is unity, then
A Separation of the constituents is the most effective
B No separation will occur
C Amount of solvent required will be minimum
D Solvent flow rate should be very low
The solvent used in liquid-liquid extraction should have __________ less than one.
A Selectivity
B Distribution co-efficient
C Both A & B
D Neither A nor B
The solvent used in liquid extraction should not have high latent heat of vaporisation, because
A The pressure drop and hence the pumping cost will be very high
B It cannot be recovered by distillation
C Its recovery cost by distillation may be prohibitatively high
D It will decompose while recovering by distillation
Extraction of pencillin employs a __________ extraction coloumn.
A Centrifugal
B Packed
C Plate
D None of these
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)
A Increases
B Decreases
C Remains unaffected
D Increases Linearly
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling
A Loose
B Tight
C Critical
D None of the above
Solvent used for extraction of oil is
A Hexane
B Methyl ethyl ketone
C Furfurol
D None of these
Furfural solvent extraction is used for upgrading (by dissolving aromatics)
A Naphtha
B Lubricating oils
C Wax
D Cracking feedstock
The commonly used solvent in supercritical extraction is
A Methyl ethyl ketone
B Water
C Carbon tetrachloride
D Carbon dioxide

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