A) \[C{{H}_{3}}CH_{2}^{-}>NH_{2}^{-}>HC\equiv {{C}^{-}}>O{{H}^{-}}\]
B) \[HC\equiv {{C}^{-}}>C{{H}_{3}}C{{H}_{2}}>NH_{2}^{-}>O{{H}^{-}}\]
C) \[O{{H}^{-}}>NH_{2}^{-}>HC\equiv C{{~}^{-}}>C{{H}_{3}}CH_{2}^{-}\]
D) \[NH_{2}^{-}>HC\equiv C{{~}^{-}}>O{{H}^{-}}>C{{H}_{3}}CH_{2}^{-}\]
Correct Answer: A
Solution :
[a] Stronger the acid, weaker the conjugate base. Since acid character follows the order \[{{H}_{2}}O>HC\equiv CH>N{{H}_{3}}>C{{H}_{3}}-C{{H}_{3}}\] (Acid character), the basic character of their conjugate bases decreases in the reverse order, i.e., \[C{{H}_{3}}CH_{2}^{-}>NH_{2}^{-}>HC\equiv {{C}^{-}}~>O{{H}^{-}}\] (Basic character)You need to login to perform this action.
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