`PCl_3` reacts with water to form

Options

A. `PH_3`
B. `H_3 PO_3 , HCl`
C. `POCl_3`
D. `H_3 PO_4`

Explanation

To determine the products formed when phosphorus trichloride (PCl₃) reacts with water, we can follow these steps:

### Step 1: Write the chemical equation for the reaction.
When PCl₃ reacts with water (H₂O), the reaction can be represented as:
\[ \text{PCl}_3 + \text{H}_2\text{O} \rightarrow \text{H}_3\text{PO}_3 + \text{HCl} \]

### Step 2: Identify the products.
From the reaction, we can see that the products formed are:
1. Phosphorous acid (H₃PO₃)
2. Hydrochloric acid (HCl)

### Step 3: Balance the chemical equation.
To ensure that the equation is balanced, we need to check the number of atoms of each element on both sides of the equation. The balanced equation is:
\[ \text{PCl}_3 + 3\text{H}_2\text{O} \rightarrow \text{H}_3\text{PO}_3 + 3\text{HCl} \]

### Step 4: Conclude the reaction.
Thus, when phosphorus trichloride reacts with water, it primarily forms phosphorous acid (H₃PO₃) and hydrochloric acid (HCl).

### Final Answer:
The reaction of PCl₃ with water produces H₃PO₃ (phosphorous acid) and HCl (hydrochloric acid).

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