List of top Chemistry Questions on Acid-base concepts and principles asked in SRMJEEE

Four species are listed below
I. HC\(O_3^ - \)
II. H ₃O⁺ 
III. HS\(O_4^ - \)
IV. HSO₃F 
Which one of the following is the correct sequence of the acid strength?

Using Lewis concept, determine the decreasing order of basic strengths of\( ClO_{4 ^-} , ClO_{3^-} \,\,and \,\,ClO_{2 ^-}\)