19 public questions tagged with this topic.
Pyridinium chlorochromate (PCC) is used to selectively oxidize primary alcohols to aldehydes without further oxidation to carboxylic acids. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Relevant Chemistry topic covering principles and examples as per NCERT.
Primary alcohols can be synthesized by the reduction of aldehydes using LiAlH â‚„ . This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.
Chromic acid (H â‚‚ CrO â‚„ ) oxidizes primary alcohols to aldehydes and secondary alcohols to ketones, producing a color change. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Relevant Chemistry topic covering principles and examples as per NCERT.
Acetone (CH₃COCH₃) reacts with CH₃MgBr (Grignard reagent), adding a methyl group, followed by hydrolysis to form 2-methylpropan-2-ol ((CH₃)₃COH).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones
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
