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Reactions of Aryl Amines (Diazo Salts)

which one of ...

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which one of the following act only as a base 1] h2s 2]hs^- 3] s^2- 4] h2o

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Q. Which choice or choices demonstrate amphoterism?
i.

H C l + H_{2} O \to H_{3} O^{+} + C l^{-}

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

H S^{-} + H C l \to C l^{-} + H_{2} S

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

H C l + N a O H \to N a C l + H_{2} O

N a C l + H_{2} O \to H C l + N a O H

K_{a 1}, K_{a 2}

K_{a 3}

are the respective ionisation constants for the following reactions;

H_{2} S ⇌ H^{+} H S^{-}

H S^{-} ⇌ H^{+} S^{2 -}

H_{2} S ⇌ 2 H^{+} S^{2 -}

The correct relationship between

K_{a 1}, K_{a 2}

K_{a 3}

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}^{-}

(c) Which of the following behave both as Bronsted acids as well as Bronsted bases?

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

C + H_{2} O ⟶ C O + H_{2}, H_{2} O

Q. Which is the strongest hydrogen bond and the weakest hydrogen bond in the following. 1)H2S,H2O. 2) H2O,H2S. 3)NH3,C2H5OH. 4)C2H5OH,NH3

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