WorksheetsPurification of organic compounds
Total questions: 15
Worksheet time: 8mins
Which of the following is not a common method used for purification?
a) Sublimation
b) Crystallisation
c) Electrolysis
d) Chromatography
Crystallisation is based on the ____________
a) Difference in melting point
b) Difference in boiling point
c) Difference in pressure
d) Difference in solubility
Insoluble impurities from solution during crystallization are removed by ____________
a) Drying
b) Filtration
c) Heating
d) Cooling
The nature of the crystallization process is governed by _____________
a) Thermodynamics
b) Kinetic factors
c) Thermodynamics and Kinetic factors
d) None of the mentioned
Porcelain pieces are put into the distillation flask to avoid ____________
a) Overheating
b) Uniform boiling
c) Bumping of the solution
d) None of the mentioned options
Which of the following is not separated through distillation process?
a) Acetone and water
b) Aniline and chloroform
c) Impurities in Sea water
d) Milk and water
Steam distillation process is used to separate substances which are ____________
a) Steam volatile
b) Steam volatile and immiscible with water
c) Steam volatile and miscible with water
d) All of the mentioned
The organic liquid in steam distillation vaporizes at ____________
a) Lower temperature than its boiling point
b) Higher temperature than its boiling point
c) At its boiling point
d) None of the mentioned
Used to separate an insoluble solid from liquid or soluble solid
Filtration
Distillation
Crystallisation
Evaporation
Used to separate a dissolved solid from its solution
Filtration
Evaporation
Crystallisation
Sublimation
Used to separate liquid mixtures for identification
Filtration
Distillation
Fractional distillation
Chromatography
Recrystallization is based on the ____________.
a) Difference in melting point
b) Difference in boiling point
c) Difference in pressure
d) Difference in solubility
Insoluble impurities from solution during crystallization are removed by ____________
a) Drying
b) Filtration
c) Heating
d) Cooling
Which physical property of compounds are you taking advantage of when purifying a liquid mixture by distillation?
Melting point
Boiling point
Freezing point
Sublimation point
Used to separate immiscible liquids
Paper chromatography
Separating funnel
Distillation
Glass funnel
