The base strength of weak bases is directly proportional to their base ionization constant (K_b). A larger K_b value indicates a stronger base.
The values of the ionization constant of some weak bases at 298 K are given below - Base K$_{b}$ Triethylamine 6.45 × 10$^{-5}$ 10$^{-9}$ Aniline 4.27 × 10$^{-10}$ The correct order of the base strength is - (1) Pyridine > Triethylamine > Aniline > NH$_{4}$OH (2) Triethylamine < NH$_{4}$OH < Pyridine < Aniline (3) Triethylamine > NH$_{4}$OH > Pyridine > Aniline (4) Triethylamine > Pyridine > Aniline > NH$_{4}$OH (5) Question not attempted
Asked in Department Recruitment 2024 (Chemist) 2024 · Topic: Acid, Base and Salt (Strength of Acids and Bases (Strong and Weak Acids/Bases))
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Answer: C. (3) Triethylamine > NH$_{4}$OH > Pyridine > Aniline
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