A process controlled by Distributive law is__________________?
A. Crystallization
B. Sublimation
C. Solvent extraction
D. Filtration
Experimental Techniques
Different components of a mixture have different Rf values due to________________?
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
Identification of the components of a sample is_________________?
Identification of the components of a sample is_________________?
A. Quantitative analysis
B. Qualitative analysis
C. Stoichiometry
D. Physical chemistry
The technique used to separate components of mixture in solid phase ?
The technique used to separate components of mixture in solid phase ?
A. Crystallization
B. Filtration
C. Sublimation
D. Solvent extraction
The tip of funnel should touch the wall of the breaker in order to avoid____________________?
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
Size of filter paper is selected according to the amount of__________________?
Size of filter paper is selected according to the amount of__________________?
A. solution
B. amount of insoluble solute
C. amount of soluble solute
D. Amount of solvent
Rate of filtration can be increased by applying gentle suction______________?
Rate of filtration can be increased by applying gentle suction______________?
A. Gooch crucible
B. Filter paper
C. Sintered crucible
D. All of the above
In crystallization if the solvent is inflammable then direct heating is________________?
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
In solvent extraction ether is used to separate products of organic synthesis from________________?
In solvent extraction ether is used to separate products of organic synthesis from________________?
A. water
B. iodine
C. hydrochloric acid
D. gases
The use of CaCl2 and PCl5 in the process of crystallization is as a____________________?
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