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.Management Sciences
Category: Experimental Techniques
Direct conversion of solids into vapours is called ___________________?
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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
The tip of funnel should touch the wall of the breaker in order to avoid____________________?
A. Inconsistent flow of filtration
B. splashing
C. premature crystallization
D. all of above
Animal charcoal adsorbs the coloured_________________?
A. impurities
B. crystals
C. solvents
D. both A & B
The use of CaCl2 and PCl5 in the process of crystallization is as a____________________?
A. oxidizing agent
B. reducing agent
C. drying agent
D. colouring agent
In crystallization if the solvent is inflammable then direct heating is________________?
A. needed
B. avoided
C. depends on temperature
D. crystallization does not involve heating
Which of the following technique is simple and efficient to purify a substance____________________?
A. Filtration
B. Sublimation
C. Crystallization
D. Solvent extraction
Which of the following way in used for classification of chromatography ?
A. Shape
B. Phase
C. Mechanism
D. All
Which is not related pair of term used in analytical techniques________________?
A. Filtrate residue
B. Sublimate sublimation
C. Drying desiccator
D. Separating funnel mother liquor
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