Related Questions

The solvent used in Barisol dewaxing process is
A Hexane
B Furfural
C Benzol and ethylene dichloride
D Methyl ethyl ketone (MEK)
Solvent used for dewaxing of petroleum products are
A Furfural
B Methyl ethyl ketone (MEK)
C Propane
D Both B & C
Pick out the undesirable property for a solvent meant for dewaxing of lube oil.
A Complete miscibility with oil
B High solubility of wax in the solvent
C Both A & B
D Neither A nor B
Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the
A Elimination of solvent drying facility
B Higher nitration temperature
C Lower solvent dilution ratio
D All of the above
Selectivity of the solvent used in solvent extraction should be
A 1
B > 1
C 0
'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts.
A Steam reforming
B Distillation
C Desulphurisation
D None of these
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
A Polythene
B PVC
C Rayon
D Polyvinyl acetate
The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.
A Less than
B More than
C Equal to
D Either more or less; depends on the solvent
If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its
A Bubble point
B Saturation temperature
C Dew point
D Both B and C
Addition of a non-volatile solute to a solvent produces a __________ in its solvent.
A Freezing point elevation
B Boiling point depression
C Vapor pressure lowering
D All of the above

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