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Aniline (C₆H₅NH₂) forms 2,4,6-tribromoaniline with excess Br₂ in water, substituting three bromine atoms, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Alkylation, Acylation and Electrophilic Substitution
Phenol (C₆H₅OH) reacts with Na to form sodium phenoxide (C₆H₅ONa) and H₂ gas, showcasing its acidic nature.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Phenols and Ethers - Williamson and Other Methods
Lucas reagent (ZnCl₂ in conc. HCl) reacts fastest with tertiary alcohols like (CH₃)3COH due to the stability of the tertiary carbocation, causing immediate turbidity.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
Phenol reacts with Br₂ in water to form a white precipitate of 2,4,6-tribromophenol due to the strong activation of the ring by the -OH group.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Chemical Reactions of Phenols and Ethers and Uses
Ethanol (CH₃CH₂OH), a primary alcohol, is oxidized to acetaldehyde (CH₃CHO) with PCC, which selectively oxidizes to the aldehyde stage.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Chemical Reactions of Alcohols - Dehydration Oxidation Esterification
Electrophilic substitution of benzene with chlorine and a Lewis acid (e.g., FeCl₃ ) replaces a hydrogen with chlorine, forming chlorobenzene ( C₆H₅Cl ).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Polyhalogen Compounds - Chloroform Iodoform DDT Freons
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