Chloroform with zinc dust in water gives:

Options

A. `CH_(4)`
B. Chloropicrin
C. `"CCl"_(4)`
D. `CH_(2)Cl_(2)`

Answer

To determine the product formed when chloroform (CHCl3) reacts with zinc dust in water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are chloroform (CHCl3) and zinc dust (Zn).

2. **Reaction of Zinc with Water**: When zinc dust is added to water, it reacts to form zinc hydroxide (Zn(OH)2) and nascent hydrogen (H). The reaction can be represented as:
\[ Zn + 2H_2O \rightarrow Zn(OH)_2 + H_2 \]
Here, nascent hydrogen is produced, which is in a highly reactive form.

3. **Role of Nascent Hydrogen**: Nascent hydrogen acts as a reducing agent. In this reaction, it will reduce chloroform (CHCl3).

4. **Reduction of Chloroform**: The reduction of chloroform by nascent hydrogen leads to the formation of methane (CH4) and hydrochloric acid (HCl). The reaction can be summarized as:
\[ CHCl_3 + 3H \rightarrow CH_4 + 3HCl \]
This shows that chloroform is converted into methane gas (CH4) and hydrochloric acid (HCl).

5. **Final Products**: Therefore, the main product of the reaction between chloroform and zinc dust in water is methane (CH4) along with hydrochloric acid (HCl).

### Conclusion:
The correct answer to the question is that chloroform with zinc dust in water gives methane (CH4).