Question
The correct order of acidity of oxoacids of halogens is
A.
$$HClO < HCl{O_2} < HCl{O_3} < HCl{O_4}$$
B.
$$HCl{O_4} < HCl{O_3} < HCl{O_2} < HClO$$
C.
$$HClO < HCl{O_4} < HCl{O_3} < HCl{O_2}$$
D.
$$HCl{O_4} < HCl{O_2} < HCl{O_3} < HClO$$
Answer :
$$HClO < HCl{O_2} < HCl{O_3} < HCl{O_4}$$
Solution :
Acidic strength of oxoacids of a particular halogen atom increases with increase in oxidation number, thus the order of acidic strength is
$$\mathop {HClO}\limits^{ + 1} < \mathop {HCl{O_2}}\limits^{ + 3} < \mathop {HCl{O_3}}\limits^{ + 5} < \mathop {HCl{O_4}}\limits^{ + 7} .$$