`CHCl_(3)` is kept in brown bottles well stoppered and also with 1% alcohol so that it may not form -

Options

A. `CH_(2)Cl_(2)`
B. `COCl_(2)`
C. `"CCl"_(4)`
D. None of these

Answer

To solve the question regarding why CHCl₃ (chloroform) is kept in brown bottles with 1% alcohol, we can break it down into the following steps:

### Step 1: Understanding the Stability of Chloroform
Chloroform (CHCl₃) is a chemical compound that can undergo decomposition when exposed to light and oxygen. This decomposition can lead to the formation of harmful byproducts.

**Hint:** Consider the environmental conditions that can affect the stability of chemical compounds.

### Step 2: Identifying the Byproduct
When chloroform is exposed to light and oxygen, it can react to form carbonyl chloride (COCl₂), which is also known as phosgene. Phosgene is a highly toxic compound that poses serious health risks.

**Hint:** Think about the chemical reactions that can occur when organic compounds are exposed to light and oxygen.

### Step 3: The Role of Brown Bottles
To prevent the reaction of chloroform with light, it is stored in brown bottles. Brown glass blocks out ultraviolet light, which helps to prevent the decomposition of chloroform.

**Hint:** Reflect on how the physical properties of materials can be used to protect sensitive chemicals.

### Step 4: The Addition of Alcohol
The addition of 1% alcohol serves as a stabilizer. Alcohol can help to inhibit the reaction between chloroform and oxygen, further reducing the risk of forming phosgene.

**Hint:** Consider how certain additives can stabilize chemical compounds and prevent unwanted reactions.

### Step 5: Conclusion
In conclusion, CHCl₃ is kept in brown bottles with 1% alcohol to prevent the formation of carbonyl chloride (COCl₂), a toxic compound that can result from its reaction with oxygen in the presence of light.

**Hint:** Summarize the reasons for using specific storage methods and additives in chemical handling.

### Final Answer
The correct answer to the question is that CHCl₃ is kept in brown bottles with 1% alcohol to prevent the formation of carbonyl chloride (COCl₂), which is a poisonous compound.