The number of $\mathrm{P}-\mathrm{OH}$ bonds and the oxidation state of phosphorus atom in pyrophosphoric…

The number of $\mathrm{P}-\mathrm{OH}$ bonds and the oxidation state of phosphorus atom in pyrophosphoric acid $\left(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}ight)$ respectively are :
  1. four and four
  2. five and four
  3. five and five
  4. four and five

Solution



Oxidation State :
Each $\mathrm{P}$ atom is bound to one oxygen $=-1$ $2 \mathrm{OH}=-1 \times 2=-2$
Oxygen $=-2$ Total $=-5$ $\mathrm{P}=+5$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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