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Question

Which of the hydrated species can exist?
I. H5O+2
II. H3O+
III. H3O−2
IV. H7O+3
Select alternate from.

A
II only
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B
I and II
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C
I, II and IV
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D
I, II, III and IV
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Solution

The correct option is D I, II, III and IV
Water on self ionization form H3O+. Water in strong acid also lead to the formation of H5O+2, H7O+3 and water in strong alkali also lead to the formation of H3O2. So all the hydrated species can exist.

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