`underline(P)Cl_(3)+H_(2)O to H_(3)PO_(3)+HCl`

Options

A. If product is oxy acid with -ic suffix.
B. If product is oxy acid with -ous suffix
C. If product are two oxy acids one with -ic suffix and otherone with -ous suffix.
D. If product is not oxy acid, neither with -ic suffix nor with -ous suffix

Answer

To solve the reaction \( \text{PCl}_3 + \text{H}_2\text{O} \rightarrow \text{H}_3\text{PO}_3 + \text{HCl} \), we will analyze the components and the nature of the products formed.

### Step 1: Identify the reactants and products
- **Reactants**: Phosphorus trichloride (\( \text{PCl}_3 \)) and water (\( \text{H}_2\text{O} \)).
- **Products**: Phosphorous acid (\( \text{H}_3\text{PO}_3 \)) and hydrochloric acid (\( \text{HCl} \)).

### Step 2: Determine the type of reaction
This reaction is a hydrolysis reaction where phosphorus trichloride reacts with water. The chlorine atoms in \( \text{PCl}_3 \) are replaced by hydroxyl groups from water, leading to the formation of an acid.

### Step 3: Analyze the products
- **Phosphorous acid (\( \text{H}_3\text{PO}_3 \))**: This is an oxyacid because it contains hydrogen, oxygen, and phosphorus. It can release protons (H⁺) when dissolved in water.
- **Hydrochloric acid (\( \text{HCl} \))**: This is not an oxyacid because it does not contain oxygen; it is a binary acid.

### Step 4: Classify the oxyacid
Phosphorous acid has the formula \( \text{H}_3\text{PO}_3 \). The corresponding oxyanion is \( \text{PO}_3^{3-} \), which is called phosphite. The naming convention indicates that since the oxyanion ends in "ite," the acid is named with the suffix "ous." Thus, \( \text{H}_3\text{PO}_3 \) is called phosphorous acid.

### Step 5: Conclusion
In this reaction, we have formed one oxyacid (phosphorous acid) and one non-oxyacid (hydrochloric acid). Therefore, the correct classification of the products is that there is one oxyacid (with the "ous" suffix) and one non-oxyacid.

### Final Answer
The correct option is that the product is an oxyacid with the "ous" suffix.

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