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.Management Sciences
Category: Experimental Techniques
Safe and the most reliable method of drying crystals is through_________________?
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A. Filter paper
B. Vacuum desiccators
C. Oven
D. None of these
Crystallization does not involve_______________?
A. heating
B. sublimation
C. cooling
D. vaporization
Different components of a mixture have different Rf values due to________________?
A. Polar solvent used
B. Combination of solvents used
C. Their different distribution coefficients in the solvent
D. Distributive law
Separation of a solid from its hot saturated solution by cooling is called__________________?
A. vapourization
B. solvent extraction
C. filtration
D. crystallization
A technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________?
A. Adsorption chromatography
B. Ascending chromatography
C. Radial chromatography
D. Descending chromatography
Without suction pump filtration is __________________?
A. Fast process
B. Slow process
C. Rapid process
D. All are possible
Direct conversion of solids into vapours is called ___________________?
A. Solvent extraction
B. sublimation
C. crystallization
D. vaporization
Rate of filtration can be increased by applying gentle suction______________?
A. Gooch crucible
B. Filter paper
C. Sintered crucible
D. All of the above
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