Question

Fill in the blank spaces by choosing the correct words from the given list.

List : Sulfurous, nitric acid, slowly, oxygen, phosphoric

Phosphorus pentaoxide on dissolving in water forms _________ acid.

Answer 1

• Phosphorus pentaoxide dissolving in water forms phosphoric acid.
• The given reaction is
• $\underset{\mathrm{Pentaoxide}}{\underset{\mathrm{Phosphorus}}{{\mathrm{P}}_2{\mathrm{O}}_5\left(\mathrm{s}\right)}}+\underset{\mathrm{Water}}{3{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Phosphoric}\mathrm{acid}}{2{\mathrm{H}}_3{\mathrm{PO}}_4\left(\mathrm{aq}\right)}$.

Therefore, phosphorus pentaoxide dissolving in water forms phosphoric acid.