13 public questions tagged with this topic.
Alkyl iodides like CH₃CH₂I react with AgNO₃ to form AgI , a yellow precipitate, due to easy ionization.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
Primary halides react slowest with AgNO₃ via SN₁ . CH₃CH₂CH₂Cl is primary and forms AgCl slowest among the options.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
In the Liebig method, H₂O produced from hydrogen is absorbed by anhydrous CaCl₂ (calcium chloride).
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Structural Isomerism - Chain Position Functional Metamerism
Sodium nitroprusside reacts with Na₂S (formed from sulphur) to produce a violet color in Lassaigne’s test.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Structural Isomerism - Chain Position Functional Metamerism
Prussian blue indicates nitrogen (forming NaCN), but no AgCl precipitate suggests chlorine is not ionic or not extracted as NaCl, possibly due to covalent bonding not broken by sodium fusion.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Stereoisomerism - Geometrical and Optical Isomerism
Sulphur forms Na₂S in Lassaigne’s test, which reacts with sodium nitroprusside to give a violet-colored complex, Na₄[Fe(CN)₅NOS].
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Stereoisomerism - Geometrical and Optical Isomerism
Iodine forms NaI in Lassaigne’s test, which reacts with AgNO₃ to form a yellow precipitate of AgI.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Fundamental Concepts - Reaction Mechanism - Fission and Reaction Intermediates
Chlorine forms NaCl in Lassaigne’s test, which reacts with AgNO₃ to form a white precipitate of AgCl.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Classification and Nomenclature of Organic Compounds - IUPAC
Bromine forms NaBr in Lassaigne’s test, which reacts with AgNO₃ to form a pale yellow precipitate of AgBr.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Classification and Nomenclature of Organic Compounds - IUPAC
Blood-red color with FeCl₃ indicates nitrogen and sulphur together (NaSCN), while no violet color with sodium nitroprusside suggests sulphur alone isn’t detected, but the former confirms both.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Classification and Nomenclature of Organic Compounds - IUPAC
