The number of P-O-H and P-H bonds in orthophosphorus acid molecule are relatively

Options

A. 2 , 1
B. 1 , 2
C. 2 , 2
D. 3 , 0

Explanation

To determine the number of P-O-H and P-H bonds in orthophosphorus acid (H₃PO₃), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Chemical Formula**:
- The formula for orthophosphorus acid is H₃PO₃.

2. **Draw the Structure**:
- Orthophosphorus acid consists of a phosphorus (P) atom bonded to three hydroxyl (OH) groups and one double bond to an oxygen (O) atom. The structure can be visualized as:
```
O
||
HO-P-OH
|
OH
```

3. **Count the P-O-H Bonds**:
- In the structure, each hydroxyl group (OH) represents a P-O-H bond. Since there are three hydroxyl groups, we have:
- Number of P-O-H bonds = 3.

4. **Count the P-H Bonds**:
- The phosphorus atom is bonded to one hydrogen atom directly (from one of the OH groups). Therefore, the number of P-H bonds is:
- Number of P-H bonds = 1.

5. **Summarize the Counts**:
- The final counts are:
- P-O-H bonds = 3
- P-H bonds = 1

### Final Answer:
- The number of P-O-H and P-H bonds in orthophosphorus acid (H₃PO₃) are 3 and 1, respectively.