Q.

Which is the strongest acid in the following?

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a

HClO4

b

H2SO3

c

H2SO4

d

HClO3

answer is A.

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Detailed Solution

HCl+7¯O4  with highest oxidation number and its conjugate base is resonance stabilised, hence it is most acidic. Cl is more electronegative than S.
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Which is the strongest acid in the following?