Chloroform reacts with concentrated `HNO_(3)` to give

Options

A. Water gas
B. Tear gas
C. Laughing gas
D. Producer gas

Explanation

To solve the question regarding the reaction of chloroform with concentrated HNO3, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactant is chloroform, which has the chemical formula CHCl3.
- The other reactant is concentrated nitric acid, HNO3.

2. **Understand the Reaction**:
- Chloroform (CHCl3) can react with concentrated nitric acid (HNO3). In this reaction, the nitronium ion (NO2+) from nitric acid will interact with chloroform.

3. **Proton Transfer**:
- The hydroxide ion (OH-) can abstract a proton (H+) from chloroform. This leads to the formation of a chloroformium ion (CHCl3H+).

4. **Formation of Products**:
- After the proton transfer, the nitronium ion (NO2+) will react with the chloroformium ion. This results in the substitution of one of the chlorine atoms in chloroform by a nitro group (NO2).
- The final product formed is CHCl2(NO2), which is known as chloropicrin.

5. **By-products**:
- In addition to chloropicrin, water (H2O) is also produced as a by-product of this reaction.

6. **Final Reaction**:
- The overall reaction can be summarized as:
\[ \text{CHCl}_3 + \text{HNO}_3 \rightarrow \text{CCl}_3\text{NO}_2 + \text{H}_2\text{O} \]
- The compound CCl3NO2 is commonly referred to as chloropicrin or tear gas.

### Final Answer:
Chloroform reacts with concentrated HNO3 to give chloropicrin (CCl3NO2) and water.

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