Question

$\mathrm{P}-\mathrm{P}$ bond present in_____.

• A. ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$
• B. ${\left({\mathrm{HPO}}_3\right)}_{\mathrm{n}}$
• C. ${\mathrm{H}}_6{\mathrm{P}}_4{\mathrm{O}}_{13}$
• D. None Of These

Answer 1

The correct option is A

${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$

Explanation of correct option.

Option (A ) ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$

• Hypophosphoric acid is a mineral acid with the formula ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$, with Phosphorus in a formal oxidation state of +4.
• It has $\mathrm{P}-\mathrm{P}$ bond.

Explanation of incorrect options:

Option (B) ${\left({\mathrm{HPO}}_3\right)}_{\mathrm{n}}$

• ${\left({\mathrm{HPO}}_3\right)}_{\mathrm{n}}$ is the general chemical formula of Metaphosphoric acids, where $\mathrm{n}$ denoted the number of phosphoric acid units present in the ring.
• It does not have $\mathrm{P}-\mathrm{P}$ bonds.

• Metaphosphoric acid is a corrosive, inorganic, cyclic Polyphosphate formed from bonded Phosphoric acid units.
• Hence, incorrect option.

Option (C) ${\mathrm{H}}_6{\mathrm{P}}_4{\mathrm{O}}_{13}$

• It is the chemical formula of Tetra phosphoric acid.
• It does not have $\mathrm{P}-\mathrm{P}$ bonds.
• 
• Hence, incorrect option.

Option (D) None of these.

• Since ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$ have $\mathrm{P}-\mathrm{P}$ bonds.
• Hence, this is an incorrect option.

Therefore, option (A) is the correct answer.