17 public questions tagged with this topic.
NaBH₄ reduces 3-methylbutan-2-one (CH₃COCH(CH₃)₂) to 3-methylbutan-2-ol (CH₃CH(OH)CH(CH₃)₂), a secondary alcohol.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
NaBH₄ reduces 4-methylpentan-2-one (CH₃COCH₂CH(CH₃)₂) to 4-methylpentan-2-ol (CH₃CH(OH)CH₂CH(CH₃)₂), a secondary alcohol.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
NaBH₄ reduces ketones to secondary alcohols. Cyclohexanone (C₆H₁₀O) forms cyclohexanol (C₆H₁1OH).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
NaBH₄ reduces heptan-4-one (CH₃CH₂CH₂COCH₂CH₂CH₃) to heptan-4-ol (CH₃CH₂CH₂CH(OH)CH₂CH₂CH₃), a secondary alcohol.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Aldehydes are more reactive than ketones: CH₃CHO (aldehyde) > CH₃COCH₃ (simple ketone) > C₆H₅COCH₃ (aromatic ketone, steric hindrance).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Aldehydes are more reactive than ketones due to less steric hindrance and greater electrophilicity: CH₃CHO > C₆H₅CHO (aromatic, less reactive) > CH₃COCH₃.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Pentanal (CH₃CH₂CH₂CH₂CHO) reacts with ethanal (CH₃CHO) in a cross aldol condensation, forming 2-methylhept-2-enal (CH₃CH₂CH₂CH₂CH\=C(CH₃)CHO), a seven-carbon unsaturated aldehyde.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
2-Methylpropanal ((CH₃)₂CHCHO) lacks α-hydrogens, so it undergoes Cannizzaro reaction, forming 2-methylpropanol ((CH₃)₂CHCH₂OH) and 2-methylpropanoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Methanal (HCHO) lacks α-hydrogens, so it undergoes Cannizzaro reaction, forming methanol (CH₃OH) and formate ion.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
3-Phenylpropanal (C₆H₅CH₂CH₂CHO) lacks α-hydrogens, undergoing Cannizzaro reaction to form 3-phenylpropanol (C₆H₅CH₂CH₂CH₂OH) and 3-phenylpropanoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Tollens' test oxidizes aldehydes like ethanal (CH₃CHO) to carboxylic acids, forming a silver mirror, but does not react with ketones like acetone.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones
Ethanal (CH₃CHO) reacts with excess ethanol (C₂H₅OH) under acidic conditions to form an acetal, specifically 1,1-diethoxyethane (CH₃CH(OC₂H₅)₂).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones
