Chemical and Ionic Equilibrium 2 Question 33

33. Of the given anions, the strongest base is

(1981, 1M)

(a) ClO

(b) ClO2

(c) ClO3

(d) ClO4

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Solution:

  1. The order of acidic strength of conjugate acids is

$$ \mathrm{HOCl}<\mathrm{HClO}{2}<\mathrm{HClO}{3}<\mathrm{HClO}_{4} $$

Reverse is the order of basic strength of their conjugate base, i.e. ClOis the strongest base.