6 public questions tagged with this topic.
Close boiling points (5°C difference) require fractional distillation for large-scale separation.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Sublimation separates solids that transition directly to the gas phase upon heating (e.g., naphthalene) from non-sublimable impurities.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Simple distillation is suitable for separating liquids with boiling point differences greater than 25–30°C.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Adsorption chromatography separates compounds based on their differential adsorption on a stationary phase like silica gel.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Differential extraction can exploit solubility differences (e.g., water vs. organic solvent), while the 30°C boiling point difference also allows simple distillation, but solubility makes extraction more specific.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Sublimation is for solids, not liquids. Simple distillation (40°C difference) or differential extraction (solubility) would work, but sublimation is irrelevant.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Stereoisomerism - Geometrical and Optical Isomerism
