Question

The correct decreasing order of basic strength of the following species is

• A. $ O{{H}^{-}}>NH_{2}^{-}>{{H}_{2}}O>N{{H}_{3}} $
• B. $ NH_{2}^{-}>O{{H}^{-}}>N{{H}_{3}}>{{H}_{2}}O $
• C. $ N{{H}_{3}}>{{H}_{2}}O>NH_{2}^{-}>O{{H}^{-}} $
• D. $ {{H}_{2}}O>N{{H}_{3}}>O{{H}^{-}}>NH_{2}^{-} $

Answer 1

Answer: (B)

$ N{{H}_{3}} $ is more basic than $ {{H}_{2}}O, $ therefore, $ NH_{2}^{-} $ is a stronger base than $ O{{H}^{-}} $ . Thus, the decreasing order of basic strength is $ NH_{2}^{-}>O{{H}^{-}}>N{{H}_{3}}>{{H}_{2}}O $