Question:medium
$P_2O_5$ is heated with water to give
$P_2O_5$ is heated with water to give
Updated On: Jun 24, 2026
- hypophosphorous acid
- phosphorous acid
- hypophosphoric acid
- orthophosphoric acid
Show Solution
The Correct Option is D
Solution and Explanation
To determine the product formed when P_2O_5 is heated with water, we need to look at the chemical reaction involved. P_2O_5, also known as phosphorus pentoxide, is an anhydride of phosphoric acid. Its reaction with water is as follows:
P_2O_5 + 3H_2O \rightarrow 2H_3PO_4
In this reaction, phosphorus pentoxide reacts with water to form orthophosphoric acid, which is also known as phosphoric acid and has the chemical formula H_3PO_4.
To justify the answer:
- Hypophosphorous acid (H_3PO_2): This is not formed in the reaction as its formation involves different reactants and conditions.
- Phosphorous acid (H_3PO_3): This is a product of the reaction between phosphorus trichloride (PCl_3) and water, not P_2O_5.
- Hypophosphoric acid (H_4P_2O_6): This compound requires different precursors to form.
- Orthophosphoric acid (H_3PO_4): As shown, this is the correct product formed when P_2O_5 is reacted with water.
Thus, the correct answer is orthophosphoric acid.
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