Equilibrium Question 803
Question: What is the decreasing order of basic strengths of $ O{H^{-}},NH_2^{-},H-C\equiv {C^{-}} $ and $ CH_3-CH_2^{-} $
Options:
A) $ CH_3-CH_2^{-}>NH_2^{-}>H-C\equiv {C^{-}}>O{H^{-}} $
B) $ H-C\equiv {C^{-}}>CH_3CH_2^{-}>NH_2^{-}>O{H^{-}} $
C) $ O{H^{-}}>NH_2^{-}>H-C\equiv {C^{-}}>CH_3-CH_2^{-} $
D) $ NH_2^{-}>H-C\equiv {C^{-}}>O{H^{-}}>CH_3-CH_2^{-} $
Show Answer
Answer:
Correct Answer: A
Solution:
Follow Lowry Bronsted concept for conjugate pair. Acid strength follows the order $ H_2O>C_2H_2>NH_3>C_2H_6 $ conjugate base will follow the order $ C_2H_5^{-}>NH_2^{-}>C_2{H^{-}}~>O{H^{-}}~ $
