pBlock ElementsII 1 Question 31
31. The correct order of acidic strength is
(2000, 1M)
(a) $\mathrm{Cl}{2} \mathrm{O}{7}>\mathrm{SO}{2}>\mathrm{P}{4} \mathrm{O}_{10}$
(b) $\mathrm{CO}{2}>\mathrm{N}{2} \mathrm{O}{5}>\mathrm{SO}{3}$
(c) $\mathrm{Na}{2} \mathrm{O}>\mathrm{MgO}>\mathrm{Al}{2} \mathrm{O}_{3}$
(d) $\mathrm{K}_{2} \mathrm{O}>\mathrm{CaO}>\mathrm{MgO}$
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Solution:
- Corresponding acids are $\mathrm{HClO}{4}, \mathrm{H}{2} \mathrm{SO}{3}$ and $\mathrm{H}{3} \mathrm{PO}_{4}$. Hence, the order of acidic strength is
$$ \mathrm{Cl}{2} \mathrm{O}{7}>\mathrm{SO}{2}>\mathrm{P}{4} \mathrm{O}_{10} $$
