pBlock ElementsII 2 Question 15
15. The set with correct order of acidic strength is
(2001, 1M)
(a) $\mathrm{HClO}<\mathrm{HClO}{2}<\mathrm{HClO}{3}<\mathrm{HClO}_{4}$
(b) $\mathrm{HClO}{4}<\mathrm{HClO}{3}<\mathrm{HClO}_{2}<\mathrm{HClO}$
(c) $\mathrm{HClO}<\mathrm{HClO}{4}<\mathrm{HClO}{3}<\mathrm{HClO}_{2}$
(d) $\mathrm{HClO}{4}<\mathrm{HClO}{2}<\mathrm{HClO}_{3}<\mathrm{HClO}$
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Solution:
- Amongst oxyacids of a given halogen, higher the oxidation number of halogen, stronger the acid. Hence,
$$ \mathrm{HOCl}<\mathrm{HClO}{2}<\mathrm{HClO}{3}<\mathrm{HClO}_{4} . $$
