Name the poisonous gas produced during the oxidation of chloroform.

Options

A. Carbon monoxide
B. Carbonyl chloride
C. Phosgene
D. Both (b) and (c)

Explanation

To solve the question regarding the poisonous gas produced during the oxidation of chloroform, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Chloroform**:
Chloroform is a chemical compound with the formula CHCl₃. It is commonly used as a solvent and in the production of other chemicals.

**Hint**: Remember that chloroform contains carbon, hydrogen, and chlorine atoms.

2. **Understand Oxidation**:
When chloroform undergoes oxidation, it reacts with oxygen. This process can lead to the formation of various products depending on the conditions.

**Hint**: Oxidation typically involves the addition of oxygen or the removal of hydrogen.

3. **Identify Products of Oxidation**:
During the oxidation of chloroform, one of the primary products formed is carbonyl chloride (COCl₂).

**Hint**: Look for the chemical formula of the products formed during the oxidation process.

4. **Recognize Carbonyl Chloride**:
Carbonyl chloride is also known as phosgene, which is a highly toxic gas.

**Hint**: Phosgene is historically significant and was used as a chemical weapon in World War I.

5. **Determine the Poisonous Gas**:
Since carbonyl chloride and phosgene refer to the same compound, both names can be used interchangeably to describe the poisonous gas produced during the oxidation of chloroform.

**Hint**: Consider the synonyms of chemical compounds to identify all possible answers.

6. **Select the Correct Answer**:
The options provided include carbon monoxide, carbonyl chloride, phosgene, and both b and c. Since carbonyl chloride and phosgene are the same, the correct answer is "both b and c."

**Hint**: When options include synonyms, ensure to check if they refer to the same substance.

### Final Answer:
The poisonous gas produced during the oxidation of chloroform is both carbonyl chloride and phosgene. Therefore, the correct answer is option d: both b and c.

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