WorksheetsPurification Techniques_Pt. 1
Total questions: 15
Worksheet time: 8mins
What is the process of purification that involves the phase transition from a solid to a gas without entering an intermediate liquid phase?
Extraction
Crystallization
Sublimation
Chromatography
Which method of purification is suitable for separating a solid mixture based on the difference in solubility between the components?
Extraction
Crystallization
Sublimation
Chromatography
What is the name of the method used to transfer a solute from one phase to another in order to separate it from impurities?
Extraction
Crystallization
Sublimation
Chromatography
Which technique is commonly used to separate and analyze organic and inorganic compounds?
Extraction
Crystallization
Sublimation
Chromatography
What is the main purpose of carrying out an extraction?
To isolate a compound from a mixture
To dissolve a solid substance in a liquid
To separate impurities from a solvent
To create a homogenous mixture
Which type of chromatography uses a strip of paper as the stationary phase?
Liquid Chromatography
Gas Chromatography
Thin-layer Chromatography
Paper Chromatography
What is the purpose of preheating the filtration setup in the crystallization method?
To prevent crystal formation
To increase the solubility of the impurities
To speed up the crystallization process
To dissolve the crystals
Which technique is commonly used to purify a volatile solid contaminated with non-volatile impurities?
Extraction
Crystallization
Sublimation
Chromatography
What is the name of the phase that consists of water in liquid/liquid extraction?
Organic phase
Aqueous phase
Solvent phase
Impurity phase
Which technique is commonly used to analyze metal ions and organic compounds in solutions?
Liquid Chromatography
Gas Chromatography
Thin-layer Chromatography
Paper Chromatography
What is the purpose of using an organic solvent in liquid-liquid extraction?
To dissolve the impurities
To increase the solubility of the solute
To separate the organic product from inorganic substances
To speed up the extraction process
Which method of purification involves dissolving a solid substance in a liquid and allowing crystals to form upon cooling?
Extraction
Crystallization
Sublimation
Chromatography
What is the main factor considered in the compatibility of solute and solvent in the crystallization method?
Density
Polarity
Vapor pressure
Boiling point
Which type of chromatography uses helium to move a gaseous mixture through a column of absorbent material?
Liquid Chromatography
Gas Chromatography
Thin-layer Chromatography
Paper Chromatography
What is the purpose of chromatography in forensics?
To analyze the dye composition of fibers
To detect pesticide or insecticide residues in food
To analyze fibers on a person's body
To test water samples for pollution
