The number of `P-O-P` and `P-OH` bonds present respectively in pyrophosphoric acid molecule are

Options

A. (2 and 4) and (2 and 4)
B. (4 and 2) and (4 and 2)
C. (4 and 2) and (2 and 4)
D. (2 and 2) and (2 and 2)

Answer

To determine the number of `P-O-P` and `P-OH` bonds in pyrophosphoric acid, we can follow these steps:

### Step 1: Understand the Structure of Pyrophosphoric Acid
Pyrophosphoric acid (H₄P₂O₇) consists of two phosphate groups linked by an oxygen atom. It can be represented structurally as follows:

```
O
||
H-O-P-O-P-OH
|| |
O OH
```

### Step 2: Identify the `P-O-P` Bonds
In the structure, we can see that there is one `P-O-P` bond connecting the two phosphorus atoms. This bond is formed by the oxygen atom that links the two phosphorus atoms together.

- **Count of `P-O-P` bonds**: 1

### Step 3: Identify the `P-OH` Bonds
Next, we need to identify the `P-OH` bonds. In the structure, each phosphorus atom is connected to hydroxyl (OH) groups.

- The first phosphorus (P) has one `P-OH` bond.
- The second phosphorus (P) also has one `P-OH` bond.
- Additionally, there are two more `P-OH` bonds from the other two hydroxyl groups attached to the first phosphorus atom.

Counting these, we find:
- **Count of `P-OH` bonds**: 4

### Step 4: Summarize the Counts
Now we can summarize our findings:
- Number of `P-O-P` bonds: 1
- Number of `P-OH` bonds: 4

### Final Answer
Thus, the number of `P-O-P` and `P-OH` bonds present in pyrophosphoric acid are **1 and 4**, respectively.

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