Q29 / 160 · TS EAMCET 2020 (10 Sep Shift 2) · Chemistry
The molecular formula of metaphosphoric acid is
- A$\mathrm{H}_3 \mathrm{PO}_4$
- Correct answerB$\mathrm{HPO}_3$
- C$\mathrm{H}_2 \mathrm{PO}_3$
- D$\mathrm{H}_3 \mathrm{PO}_2$
Solution
The molecular formula of metaphosphoric acid is $\mathrm{HPO}_3$. It's structure can be given as :
It has general formula $\left(\mathrm{HPO}_3\right)_n$. where, $n$ denotes number of phosphoric acid units present in the ring, with $n=3$ or more. In metaphosphoric acid oxidation state of phosphorus is +5 with less number of $\mathrm{H}$-atoms.
It has general formula $\left(\mathrm{HPO}_3\right)_n$. where, $n$ denotes number of phosphoric acid units present in the ring, with $n=3$ or more. In metaphosphoric acid oxidation state of phosphorus is +5 with less number of $\mathrm{H}$-atoms.
Hence, the correct answer is option: 'B'.