The correct decreasing order of basic strength of the following species is:
$H_{2} O, N H_{3}, O H^{-}, N H_{2}^{-}$

N H_{2}^{-} > O H^{-} > N H_{3} > H_{2} O

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O H^{-} > N H_{2}^{-} > H_{2} O > N H_{3}

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N H_{3} > H_{2} O > N H_{2}^{-} > O H^{-}

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H_{2} O > N H_{3} > O H^{-} > N H_{2}^{-}

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Solution

The correct option is A $N H_{2}^{-} > O H^{-} > N H_{3} > H_{2} O$
$N H_{3}$ is more basic than $H_{2} O$ , therefore $N H_{2}^{-}$ (Conjugate base of weak acid $N H_{3}$ ) is a stronger base than $O H^{-}$ .Thus decreasing order of basic strength is $N H_{2}^{-}$ > $O H^{-}$ > $N H_{3}$ > $H_{2} O$ ,

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Similar questions

Q. Arrange the following in order of decreasing bond angles, giving reasons
(i)

C H_{4}, N H_{3}, H_{2} O, B F_{3}, C_{2} H_{2}

(ii)

N H_{3}, N H_{2}^{-}, N H_{4}^{+}

Q. (a) Mention conjugate base of each of the following:

H S^{-}, H_{3} O^{+}, H_{2} {P O}_{4}^{-}, H {S O}_{4}^{-}, H F, {C H}_{3} C O O H, C_{6} H_{5} O H, H C l O_{4}, {N H}_{4}^{+}

(b) Mention the conjugate acid of each of the following:

{O H}^{-}, {C H}_{3} C O O^{-}, {C l}^{-}, {C O}_{3}^{2 -}, H_{2} {P O}_{4}^{-}, {C H}_{3} {N H}_{2}, {C H}_{3} C O O H, {N H}_{2}^{-}

H_{2} O, H {C O}_{3}^{-}, H_{2} {S O}_{4}, H_{3} {P O}_{4}, H S^{-}, {N H}_{3}

(d) Which is stronger acid in each of the following pairs?

H C l, H I; H_{2} {C O}_{3}, H_{2} {S O}_{4}; H_{2} O, H_{2} S; C_{2} H_{5} O H, C_{6} H_{5} O H

(e) Which is stronger base in each of the following pairs?

{O H}^{-}, {C l}^{-}; {O H}^{-}, {N H}_{2}^{-}; {O H}^{-}, {C H}_{3} C O O^{-}; {C H}_{3} C O O^{-}, {C l}^{-}; {N H}_{3}, {C H}_{3} {N H}_{2}

(f) Classify the following into acids and bases according to Lewis concept:

S^{2 -}, H^{+}, {O H}^{-}, B F_{3}, {N i}^{2 +}, N F_{3}, A l {C l}_{3}, S n {C l}_{4}, {N H}_{3}, {({C H}_{3})}_{2} O

Q. Give the decreasing order of basic strength of the following:
a.

N H_{3}

N H_{2} O H

N H_{2} - N H_{2}

Q. In the reaction

N H_{3} + H_{2} O \to N H_{4}^{+} + O H^{-}

Which of the following is not correct?

$O r d e r o f b a s i c i t y O r d e r o f n u c l e o p h i l i c i t y (a) F^{-} > C l^{-} > B r^{-} B r_{-} > C l^{-} > F^{-} (b) H - O - O^{-} > O H^{-} H - O - O^{-} > O H^{-} (c) C H_{3} > N H_{2}^{-} > O H - C H_{3} > N H_{2}^{-} > O H^{-} (d) H_{2} O > H_{2} S H_{2} O < H_{2} S$

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The correct decreasing order of basic strength of the following species is:H2O,NH3,OH−,NH−2

The correct option is A NH−2>OH−>NH3>H2ONH3 is more basic than H2O, therefore NH−2 (Conjugate base of weak acid NH3) is a stronger base than OH−.Thus decreasing order of basic strength is NH−2 > OH− > NH3 > H2O,

The correct decreasing order of basic strength of the following species is:
$H_{2} O, N H_{3}, O H^{-}, N H_{2}^{-}$