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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
The iodoform test requires a CH₃C\=O group. Pentan-3-one (CH₃CH₂COCH₂CH₃) has no methyl ketone group, unlike the others.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones
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
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