Chlorine react with hot and concentrated `NaOH` and produces compound (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. The average bond order between Cl and O atoms in (Y) is ___________.

Options

A. 1.67
B. `0.835`
C. 2.67
D. 2

Answer

To solve the problem step-by-step, we need to analyze the reaction between chlorine and hot concentrated sodium hydroxide (NaOH) and identify the compounds formed, as well as calculate the average bond order between chlorine and oxygen in one of the products.

### Step 1: Identify the Reaction
When chlorine (Cl₂) reacts with hot and concentrated NaOH, it produces two compounds: sodium chloride (NaCl) and sodium chlorate (NaClO₃).

### Step 2: Identify Compounds (X) and (Y)
In this reaction:
- Compound (X) is NaCl, which contains Cl⁻ ions.
- Compound (Y) is NaClO₃, which contains the chlorate ion (ClO₃⁻).

### Step 3: Determine the Precipitate with Silver Nitrate
When NaCl (compound X) is treated with silver nitrate (AgNO₃), it produces a white precipitate of silver chloride (AgCl). Therefore, compound (X) is NaCl.

### Step 4: Analyze Compound (Y)
Now, we need to analyze the structure of the chlorate ion (ClO₃⁻) to find the bond order between chlorine and oxygen.

### Step 5: Structure of ClO₃⁻
The chlorate ion (ClO₃⁻) has the following structure:
- Chlorine is bonded to three oxygen atoms.
- There are two double bonds (Cl=O) and one single bond (Cl-O⁻).

### Step 6: Count Sigma and Pi Bonds
In the structure of ClO₃⁻:
- **Sigma Bonds**:
- 1 sigma bond from Cl-O (single bond).
- 2 sigma bonds from Cl=O (double bonds).
- Total sigma bonds = 3.

- **Pi Bonds**:
- Each double bond contributes 1 pi bond.
- Total pi bonds = 2.

### Step 7: Calculate the Bond Order
The bond order can be calculated using the formula:
\[ \text{Bond Order} = 1 + \frac{\text{Number of Pi Bonds}}{\text{Number of Sigma Bonds}} \]
Substituting the values:
\[ \text{Bond Order} = 1 + \frac{2}{3} = 1 + 0.67 = 1.67 \]

### Conclusion
The average bond order between Cl and O atoms in compound (Y) (ClO₃⁻) is **1.67**.

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