pBlock ElementsII 1 Question 55
5. The pair that contains two $\mathrm{P}-\mathrm{H}$ bonds in each of the oxoacids is
(2019 Main, 10 Jan II)
(a) $\mathrm{H}{4} \mathrm{P}{2} \mathrm{O}{5}$ and $\mathrm{H}{4} \mathrm{P}{2} \mathrm{O}{6}$
(b) $\mathrm{H}{3} \mathrm{PO}{3}$ and $\mathrm{H}{3} \mathrm{PO}{2}$
(c) $\mathrm{H}{4} \mathrm{P}{2} \mathrm{O}{5}$ and $\mathrm{H}{3} \mathrm{PO}_{3}$
(d) $\mathrm{H}{3} \mathrm{PO}{2}$ and $\mathrm{H}{4} \mathrm{P}{2} \mathrm{O}_{5}$
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Solution:
- Let us consider the structure of the phosphorus oxyacids,
$$ (\mathrm{P}-\mathrm{H} \text { bonds }=2) $$
