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  • The correct decreasing order of basic strength of the following species is _______. H_{2}O, NH_{3}, OH^{-}, NH^{2-}

The correct decreasing order of basic strength of the following species is _______. H_{2}O, NH_{3}, OH^{-}, NH_{2}^{-}

(i)\; NH_{2}^{-}>OH^{-}>NH_{3}>H_{2}O

(ii)\; OH^{-}>NH_{2}^{-}>H_{2}O>NH_{3}

(iii)\;NH_{3}>H_{2}O>NH_{2}^{-}>OH^{-}

(iv)\;H_{2}O>NH_{3}>OH^{-}>NH_{2}^{-}

Answers (1)

Option (i) is the correct answer.

Explanation: The electronegativity of O is more than N atom; therefore, O-H bond is more polar than N-H bond. Therefore, O-H is more acidic than the N-H bond. NH_{2}^- and OH^-, both have a negative charge, and because of that, they are more basic than NH_{3} and H_{2}O.

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