Phosgene is a poisonous gas obtained in chloroform bottles, substance used to make it non- poisonous is `:`

Options

A. Formic acis
B. Ethanol
C. Dichloro methane
D. `CH_(3)COOH`

Answer

To solve the question regarding the substance used to make phosgene non-poisonous, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Problem**: The question states that phosgene is a poisonous gas obtained from chloroform bottles. We need to determine what substance can be used to neutralize or make it non-poisonous.

2. **Understand the Formation of Phosgene**: Phosgene (COCl2) is formed from chloroform (CHCl3) through a process called photo-oxidation. This reaction occurs when chloroform reacts with oxygen in the presence of light. The reaction can be summarized as:
\[ \text{CHCl}_3 + \text{O}_2 \xrightarrow{\text{light}} \text{COCl}_2 + \text{HCl} \]

3. **Identify the Toxicity of Phosgene**: Phosgene is known to be highly toxic, and thus, it is crucial to find a way to mitigate its effects.

4. **Determine the Substance to Neutralize Phosgene**: According to the information provided, ethanol (C2H5OH) is used to react with phosgene to form a non-poisonous compound. The reaction can be represented as:
\[ \text{COCl}_2 + 2 \text{C}_2\text{H}_5\text{OH} \rightarrow \text{C}(O)(O\text{C}_2\text{H}_5)_2 + 2 \text{HCl} \]
Here, the product formed is a non-toxic compound.

5. **Conclusion**: The substance that is used to make phosgene non-poisonous is ethanol.

### Final Answer:
The substance used to make phosgene non-poisonous is **Ethanol**.

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