9 public questions tagged with this topic.
Sublimation increases disorder (solid to gas), so Δ S > 0. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.
Sublimation is the direct transition from solid to vapor without passing through the liquid state, as seen with dry ice (Section 10.8). As per NCERT, applying relevant law/formula with correct units and sign convention leads to Sublimation. This satisfies dimensional consistency and physical conditions given, so option D is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
Sublimation is the process where a substance transitions directly from solid to gas, as observed with iodine under certain conditions. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Sublimation. This satisfies dimensional consistency and physical conditions given, so option D is scientifically correct.
Ref: NCBI Bookshelf, Ideal Gas Law: P1V1/T1 = P2V2/T2.
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
Sublimation would separate the sublimable solid effectively. Crystallization, requiring a solvent, is less suitable as it’s designed for soluble impurities, not thermal properties.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Sublimation separates the solid that sublimes at 60°C from the one that melts at 120°C, exploiting the phase change difference.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Sublimation separates based on sublimation temperature differences, effective when solubility is identical but one solid sublimes and the other does not.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Sublimation is the process where a solid turns into a gas without passing through the liquid state, useful for purifying compounds like camphor or naphthalene.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
Sublimation relies on sublimation temperature differences, ineffective here. Crystallization or extraction using water solubility would work instead.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography
