13 public questions tagged with this topic.
Ethanol (CH₃CH₂OH) oxidizes to acetaldehyde, which has a CH₃CO- group and gives a yellow iodoform precipitate with I₂ and NaOH.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
A trihydric alcohol has three -OH groups. Glycerol (CH₂OH-CHOH-CH₂OH) is a trihydric alcohol, also known as propane-1,2,3-triol.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
2-Methylpropan-2-ol ((CH₃)3COH), a tertiary alcohol, resists oxidation with KMnO₄ because it lacks an alpha hydrogen.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
CH₂=CH-CH₂OH is a 3-carbon compound with a double bond and an -OH group, commonly known as allyl alcohol.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
Butan-1-ol (CH₃CH₂CH₂CH₂OH) oxidizes to butanal, which lacks the CH₃CO- or CH₃CH(OH)- structure, giving a negative iodoform test.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The iodoform test is positive for CH₃CH(OH)- structures. Propan-1-ol (CH₃CH₂CH₂OH) oxidizes to propanal, which lacks the required group, giving a negative result.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The iodoform test is positive for alcohols with a CH₃CH(OH)- group. Propan-2-ol (CH₃CH(OH)CH₃) oxidizes to acetone, which gives a positive result.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The compound has a 4-carbon chain with -OH groups on carbons 1 and 3, named butane-1,3-diol in IUPAC nomenclature.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The compound has a 4-carbon chain with -OH groups on carbons 1 and 3, named butane-1,3-diol in IUPAC nomenclature.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
Propan-2-ol (CH₃CH(OH)CH₃), commonly known as isopropyl alcohol, is widely used as a disinfectant due to its antiseptic properties.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Chemical Reactions of Phenols and Ethers and Uses
The reactivity of alcohols with haloacids increases with the degree of substitution due to carbocation stability: tertiary > secondary > primary.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
The compound has a 4-carbon chain (butane) with an -OH on the second carbon, named butan-2-ol.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Classification and Nomenclature of Organic Compounds - IUPAC
