State true or false :
Nitrogen dioxide does not dissolve in water.

Explanation

To determine whether the statement "Nitrogen dioxide does not dissolve in water" is true or false, we can analyze the behavior of nitrogen dioxide (NO2) when it comes into contact with water.

### Step-by-Step Solution:

1. **Identify the Compound**: The compound in question is nitrogen dioxide, which has the chemical formula NO2.

2. **Understanding the Interaction with Water**: When nitrogen dioxide is introduced to water, it does not simply remain as a gas. Instead, it reacts with water.

3. **Chemical Reaction**: The reaction that occurs can be represented as follows:
\[ 2 \text{NO}_2 + \text{H}_2\text{O} \rightarrow \text{HNO}_3 + \text{HNO}_2 \]
In this reaction, nitrogen dioxide reacts with water to form nitric acid (HNO3) and nitrous acid (HNO2).

4. **Conclusion**: Since nitrogen dioxide reacts with water to form other compounds, it indicates that NO2 does indeed dissolve in water. Therefore, the statement "Nitrogen dioxide does not dissolve in water" is **false**.

### Final Answer:
The statement is **false**.

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