How many total no of Cl=O bond are present in structure of perchloric acid.

Answer

To determine the total number of Cl=O bonds present in the structure of perchloric acid (HClO4), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the chemical formula**: The chemical formula for perchloric acid is HClO4. This indicates that it contains one chlorine (Cl) atom and four oxygen (O) atoms.

2. **Draw the Lewis structure**: In the Lewis structure of HClO4, chlorine is the central atom. It is bonded to four oxygen atoms.

3. **Determine the types of bonds**:
- Chlorine forms three double bonds with three of the oxygen atoms.
- The fourth oxygen atom is bonded to chlorine through a single bond and also has a hydrogen atom (OH group).

4. **Count the Cl=O bonds**:
- From the structure, we can see that there are three double bonds between chlorine and oxygen (Cl=O).
- The fourth oxygen is connected to chlorine via a single bond (Cl-O), which does not count as a Cl=O bond.

5. **Conclusion**: Therefore, the total number of Cl=O bonds in perchloric acid is 3.

### Final Answer:
The total number of Cl=O bonds present in the structure of perchloric acid is **3**.

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