`P_(4)O_(6)` is the anhydride of the following

Options

A. `H_(3)PO_(2)`
B. `H_(3)PO_(3)`
C. `H_(3)PO_(4)`
D. `H_(3)PO_(5)`

Answer

To determine which compound \( P_4O_6 \) is the anhydride of, we can follow these steps:

### Step 1: Understand the Concept of Anhydrides
An anhydride is a compound that can be formed from another compound by the removal of water (H₂O). In this case, we are looking for a phosphorus oxide that can be formed from \( P_4O_6 \) by adding water.

### Step 2: Identify the Given Options
We have the following options:
- A: \( 3PO_2 \)
- B: \( 3PO_3 \)
- C: \( 3PO_4 \)
- D: \( 3PO_5 \)

### Step 3: Determine the Relationship Between \( P_4O_6 \) and the Options
We know that \( P_4O_6 \) is a dimer of \( P_2O_3 \). This means that if we consider \( P_2O_3 \), we can find its relationship with the options provided.

### Step 4: Analyze the Chemical Reaction
If we consider \( P_2O_3 \) and add water to it, we can derive the following:
- \( P_2O_3 + 3H_2O \rightarrow 3H_3PO_3 \)

This indicates that \( P_4O_6 \) can be formed from \( 3H_3PO_3 \) by removing water.

### Step 5: Verify the Correct Option
Since \( P_4O_6 \) is the anhydride of \( 3H_3PO_3 \), we can conclude that:
- \( P_4O_6 \) is the anhydride of \( 3PO_3 \).

Thus, the correct answer is **B: \( 3PO_3 \)**.

### Final Answer
The anhydride of \( P_4O_6 \) is \( 3PO_3 \).

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