Identify the incorrect statement among the following :

Options

A. `Cl_(2)` reacts with excess of `NH_(3)` to give `N_2` and HCl
B. `Br_2` reacts with hot and strong NaOH solution to give NaBr, `NaBrO_3, and H_2O`
C. Ozone reacts with `SO_2` to given `SO_3`
D. Silicon reacts with `NaOH_((aq))` in the presence of air to give `Na_(2)SiO_(3) and H_(2)O`

Answer

To identify the incorrect statement among the provided options, we will analyze each statement one by one based on the chemical reactions involved.

### Step 1: Analyze the First Statement
**Statement:** Chlorine reacts with excess ammonia to give nitrogen and HCl.

**Reaction:**
\[ \text{Cl}_2 + \text{NH}_3 \rightarrow \text{N}_2 + \text{HCl} \]

**Analysis:**
When chlorine reacts with ammonia, the expected products are ammonium chloride (NH4Cl) and nitrogen gas (N2). The reaction does not produce HCl directly. Therefore, this statement is **incorrect**.

### Step 2: Analyze the Second Statement
**Statement:** Bromine reacts with hot and strong NaOH solution to give Sodium Bromide, NaBrO3, and water.

**Reaction:**
\[ \text{Br}_2 + \text{NaOH} \rightarrow \text{NaBr} + \text{NaBrO}_3 + \text{H}_2O \]

**Analysis:**
This reaction is indeed correct. Bromine reacts with sodium hydroxide to produce sodium bromide, sodium bromate, and water. Thus, this statement is **correct**.

### Step 3: Analyze the Third Statement
**Statement:** Ozone reacts with sulfur dioxide to form sulfur trioxide.

**Reaction:**
\[ \text{O}_3 + \text{SO}_2 \rightarrow \text{SO}_3 + \text{O}_2 \]

**Analysis:**
This reaction is also correct. Ozone can oxidize sulfur dioxide to sulfur trioxide. Therefore, this statement is **correct**.

### Step 4: Analyze the Fourth Statement
**Statement:** Silicon reacts with sodium hydroxide in the presence of air to give Na2SiO3 and water.

**Reaction:**
\[ \text{Si} + \text{NaOH} + \text{O}_2 \rightarrow \text{Na}_2\text{SiO}_3 + \text{H}_2O \]

**Analysis:**
This reaction is valid. Silicon reacts with sodium hydroxide in the presence of air to produce sodium silicate (Na2SiO3) and water. Thus, this statement is **correct**.

### Conclusion
After analyzing all the statements, we find that the **first statement** is incorrect.

### Final Answer
The incorrect statement is: **Chlorine reacts with excess ammonia to give nitrogen and HCl.**

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