Which is an example of auto protolysis?

H_{2} O + H_{2} O ⇌ H_{3} O^{+} + {O H}^{-}

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{N H}_{3} + {N H}_{3} ⇌ {N H}_{4}^{+} + {N H}_{2}^{-}

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H_{2} {S O}_{4} + H_{2} {S O}_{4} ⇌ H_{3} {S O}_{4}^{+} + H {S O}_{4}^{+}

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All of the above

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Solution

The correct option is D All of the above
Auto protolysis is an phenomenon in which proton is transferred between same molecules in which one acts as bronsted acid and other acts as bronsted base. So all are examples of auto protolysis.

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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}^{+}

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H_{3} {P O}_{4}, H_{2} {S O}_{4}, H_{3} {P O}_{3}, H_{2} {C O}_{3}, H_{2} S_{2} O_{7}, H_{3} B O_{3}, H_{3} {P O}_{2}, H_{2} {C r O}_{4}, H_{2} {S O}_{3}

H_{2} {S O}_{4}

(a) H_{2} {S O}_{4} + N a O H \to N a H {S O}_{4} + H_{2} O

(b) H_{2} {S O}_{4} + 2 N a O H \to {N a}_{2} {S O}_{4} + 2 H_{2} O

{N H}_{4}^{+} + H_{2} O ⇋ {N H}_{3} + H_{3} O^{+}

{N H}_{4}^{+} + H_{2} O ⇋ {N H}_{3} + H_{3} O^{+}

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