Related Questions

Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
A Glycerol
B Nitro cellulose
C Camphor
D None of these
During crystallisation, formation of crystal can occur in __________ solution only.
A Saturated
B Supersaturated
C Undersaturated
D All of the above
The driving potential for the crystal growth during crystallisation is the __________ of the solution.
A Concentration
B Viscosity
C Super-saturation
D Density
In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is
A More
B Less
C Same
D More or less; depends on the nature of solution
Crystallisation of solids from a homogeneous solution is a/an __________ process.
A Exothermic
B Mildly endothermic
C Highly endothermic
D None of these
The crystallisation of a solute from a solution may be done by
A Removal of pure solvent by evaporation
B Change of temperature thereby causing supersaturation
C Changing the nature of the system by the addition of a more soluble material
D All of the above
The reverse process of fractional crystallisation is called
A Stripping
B Leaching
C Differential distillation
D Absorption
The rate of emission of radiation by a body does not depend upon the
A Wavelength of radiation
B Surface temperature of the body
C Nature of the surface
D Shape and porosity of the body
Filtration rate does not depend upon the
A Pressure drop & area of filtering surface
B Resistance of the cake & the septum
C Properties of the cake & the filtrate
D None of these
Heat transfer rate to the stock/charge in the furnace does not depend upon the
A Emissivity of the refactory walls
B Size of the furance
C Use of waste heat recovery equipments
D Thickness of the stock

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