A highly impure sample of benzoic acid is contaminated with naphthalene. Which of the following techniques would be LEAST effective for purifying the benzoic acid?
Simple distillation
Sublimation followed by recrystallization
Recrystallization from hot water
Treatment with sodium bicarbonate followed by acidification
Related Questions
Fractional distillation is a process by which the separation of different fractions from mixture of solution is carried by making use of the following property of the fractions
Freezing point
Boiling point
Melting point
Solubility
The relative adsorption of each component of the mixture is expressed in terms of
adsorption factor
retention factor
co-factor
sorption factor
A Dewar flask is usually used to:
Measure the amount of liquid
Measure known volumes of a gas
Store distilled water
Store liquid air
Which of the following process is suitable for the purification of aniline?
Simple distillation
Fractional distillation
Fractional crystallisation
Steam distillation
Which is most commonly used to dry organic liquids?
Anhydrous Sodium Sulfate
Sodium Carbonate
Sodium Chloride
Potassium Permanganate
Which of the following fractions obtained in fractional distillation of coal-tar contains benzene and toluene?
Light oil
Heavy oil
Middle oil
Green oil
The substance used as an adsorbent in the column chromatography is:
Alum
The substance used as an adsorbent in the column chromatography is:
Alum
The relative adsorption of each component of the mixture is expressed in terms of
adsorption factor
retention factor
co-factor
sorption factor
Which purification method exploits the difference in boiling points to separate a liquid metal from its impurities?
Distillation
Electrolysis
Chromatography
Zone refining
