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Question

Four species are listed below:


I.HCO−3

II.H3O+

III.HSO−4

IV.HSO3F

Which one of the following is the correct sequence of their acidic strength?

A
IV<II<III<I
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B
II<III<I<IV
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C
I<III<II<IV
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D
III<I<IV<II
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