A) \[{{H}_{2}}S{{O}_{4}}\]
B) \[HCl{{O}_{3}}\]
C) \[HCl{{O}_{4}}\]
D) \[{{H}_{2}}S{{O}_{3}}\]
Correct Answer: C
Solution :
The strength of oxyacids can also be decided with the help of the oxidation number central atom. Higher the oxidation number of central atom, more acidic te the oxyacid. \[{{H}_{2}}\overset{+6}{\mathop{S}}\,{{O}_{4}},HC\overset{+5}{\mathop{l}}\,{{O}_{3}},HC\overset{+7}{\mathop{l}}\,{{O}_{4}},{{H}_{2}}\overset{+4}{\mathop{S}}\,{{O}_{3}}\] Since, in \[HCl{{O}_{4}},\]oxidation number of Cl is highest, so \[HCl{{O}_{4}}\]is the strongest acid among the given.
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