Question: Which of the following compounds has a P-P bond :-
$\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$
$\left(\mathrm{HPO}_{3}\right)_{3}$
$\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}$
$\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}$
Correct Option: , 4
Solution:
