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Which of the hydrated species may exist?...

Which of the hydrated species may exist?
I : `H_(5)O_(2)^(+)` , II : `H_(3)O^(+)` , III : `H_(3)O_(2)^(-)` , IV : `H_(7)O_(3)^(+)`

A

II only

B

I and II

C

I, II and IV

D

I, II, III and IV

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NARENDRA AWASTHI-IONIC EEQUILIBRIUM-Exercise
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