The pair that contains two

Question:

The pair that contains two $\mathrm{P}-\mathrm{H}$ bonds in each of the oxoacids is :

  1. $\mathrm{H}_{3} \mathrm{PO}_{2}$ and $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$

  2. $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}$

  3. $\mathrm{H}_{3} \mathrm{PO}_{3}$ and $\mathrm{H}_{3} \mathrm{PO}_{2}$

  4. $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{H}_{3} \mathrm{PO}_{3}$


Correct Option: 1,

Solution:

$\mathrm{H}_{3} \mathrm{PO}_{2}$ and $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$

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