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Answer the following.
State reasons for the following: Ethylamine is soluble in water whereas aniline is insoluble in…
State reasons for the following:
(i)[1.0]
Ethylamine is soluble in water whereas aniline is insoluble in water.
(ii)[1.0]
Aliphatic amines are stronger bases than aromatic amines.
Answer
Answer (i)
AIBecause ethylamine forms hydrogen bonds with water molecules, whereas in aniline the large hydrophobic $\mathrm{C_6H_5}$ group reduces solubility in water.
Answer (ii)
AIBecause in aliphatic amines the alkyl group (+I effect) increases electron density on nitrogen, whereas in aromatic amines the lone pair on nitrogen is delocalised into the benzene ring (resonance), making it less available for donation.
From ISC 2020 Chemistry Paper 1, question 7(a).