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Solubility decreases with increasing alkyl chain length due to reduced hydrogen bonding. CH₃NH₂ (smallest chain) is most soluble, as per the PDF’s physical properties.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Methylamine (CH₃NH₂, 1C) has two N-H bonds for hydrogen bonding relative to one carbon, giving the highest solubility per carbon, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Tertiary amines like (CH₃CH₂CH₂)₃N with long alkyl chains have minimal hydrogen bonding and the highest hydrophobicity, reducing solubility, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Solubility depends on hydrogen bonding with water. CH₃NH₂ (primary amine) forms more hydrogen bonds than (CH₃)₂NH (secondary) or (CH₃)₃N (tertiary), and C₆H₅NH₂ has lower solubility due to the hydrophobic benzene ring.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Propane-1,2-diol (CH₃CH(OH)CH₂OH) has two -OH groups, enhancing hydrogen bonding with water, making it more soluble than monohydric alcohols like propan-1-ol.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
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