Which of the following is a cyclic phosphate?

Which of the following is a cyclic phosphate?
  1. $\mathrm{H}_{3} \mathrm{P}_{3} \mathrm{O}_{10}$
  2. $\mathrm{H}_{6} \mathrm{P}_{4} \mathrm{O}_{13}$
  3. $\mathrm{H}_{5} \mathrm{P}_{5} \mathrm{O}_{15}$
  4. $\mathrm{H}_{7} \mathrm{P}_{5} \mathrm{O}_{16}$

Solution

$\mathrm{H}_{5} \mathrm{P}_{5} \mathrm{O}_{15}$ or $\left(\mathrm{HPO}_{3}ight)_{5} .$ It is metaphosphoric acid which is a cyclic phosphate.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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