In `Al_2 Cl_6` the number of covalent and co-ordinate bonds are

Options

A. 3,3
B. 2,4
C. 6,2
D. 6,0

Answer

To determine the number of covalent and coordinate bonds in \( \text{Al}_2\text{Cl}_6 \), we can follow these steps:

### Step 1: Understand the Structure of \( \text{Al}_2\text{Cl}_6 \)
- The compound \( \text{Al}_2\text{Cl}_6 \) consists of two aluminum (Al) atoms and six chlorine (Cl) atoms.
- In the structure, there are four terminal Cl atoms and two bridging Cl atoms.

**Hint:** Visualize the molecular structure to identify how the atoms are connected.

### Step 2: Identify Covalent Bonds
- Each aluminum atom forms covalent bonds with the chlorine atoms.
- In \( \text{Al}_2\text{Cl}_6 \), there are a total of six covalent bonds formed between the aluminum and chlorine atoms.

**Hint:** Count the number of bonds formed directly between aluminum and chlorine atoms.

### Step 3: Identify Coordinate Bonds
- A coordinate bond (or dative bond) occurs when one atom donates both electrons to the bond.
- In \( \text{Al}_2\text{Cl}_6 \), the bridging chlorine atoms donate a lone pair of electrons to the aluminum atoms, forming coordinate bonds.
- There are two such coordinate bonds in the structure.

**Hint:** Look for atoms that donate lone pairs to form bonds with other atoms.

### Step 4: Summarize the Findings
- From the analysis, we find that there are:
- **6 covalent bonds** (between Al and Cl)
- **2 coordinate bonds** (from Cl donating lone pairs to Al)

### Final Answer
In \( \text{Al}_2\text{Cl}_6 \), there are **6 covalent bonds** and **2 coordinate bonds**.

---