Experimental Techniques In Chemistry Set 2

Results

#1. Basic principles of crystallization is that solute should be soluble in a suitable solution at

freezing temperature

room temperature

high temperature

low temperature

#2. Premature crystallization of solution of filter paper or in funnel can be avoided

filtering hot saturated solution using hot funnel

filling warm solution

quick filtration

filtering cold solution

#3. Safe and reliable method of drying crystal in through (a) pressing it between folds of filter paper

pressing it between folds of filter paper

drying it in oven

evaporation of solution

vacuum desiccator

#4. In solvent extraction solute can be separated from solution by shaking the solution with solvent which the solute is

more soluble

partially soluble

insoluble

soluble at high temperature

#5. Repeated extraction using small portions of solvent are more

accurate

efficient

slow

rapid

#6. To achieve a good separation the two liquids are gently shaken to increase their area of

miscibility

separation

contact

solubility

#7. Chromatography in which stationary phase is solid is called

partition chromatography

paper chromatography

high pressure

adsorption chromatography

#8. Chromatography involves these distribution of a solution between

two stationary phase

two mobile phase

a stationary phase and a mobile phase

two stationary and two mobile phase

#9. Chromatography in which the stationary phase is liquid is called

partition chromatography

descending chromatography

column chromatography

Adsorption chromatography

#10. In paper chromatography the rate at which solutes move depends on

distribution law

distribution coefficients

law of partial pressure

law of specific proportion

Finish