Discussion Forum



1)

 Among the following oxoacids, the correct decreasing  order of acid strength is 


A) $ HOCl > HClO_{2}>HClO_{3} > HClO_{4}$

B) $ HClO_{4}>HOCl > HClO_{2}> HClO_{3}$

C) $ HClO_{4} > HClO_{3}> HClO_{2} >HOCl$

D) $ HClO_{2} > HClO_{43}> HClO_{3} >HOCl$

Answer:

Option C

Explanation:

 Decreasing order of  strength of oxoacids 

    $ HClO_{4} > HClO_{3}> HClO_{2} >HOCl$

 The reason, Consider the structure of conjugate bases of each oxyacid of chlorine.

1632021245_c2.JPG

 The negative charge is more delocalised on ClO4-  due to resonance. Hence, ClO4- is more stable (and less basic).

Hence, we can say as the number of oxygen atoms around Cl-atom increases as oxidation number of Cl-atom increases and thus the ability of loose the H+ increases