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Equilibrium
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12/10/2021 11:09 am
Topic starter
What is the decreasing order of basic strengths of
OH-, NH2-, H–C ≡ C- and CH3 – CH2-
(a) CH3 – CH2- > NH2- > H–C ≡ C- > OH-
(b) H–C ≡ C- > CH3 – CH2- > NH2- > OH-
(c) OH- > NH2- > H–C ≡ C- > CH3 – CH2-
(d) NH2- > H–C ≡ C- > OH- > CH3 – CH2-
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12/10/2021 11:12 am
Correct answer: (a) CH3 – CH2- > NH2- > H–C ≡ C- > OH-
Explanation:
Follow Lowry Bronsted concept for conjugate pair. Acid strength follows the order H2O > C2H2 > NH3 > C2H6 conjugate base will follow the order
CH3 – CH2- > NH2- > H–C ≡ C- > OH-