The following is used in paint removing

Options

A. `CHCl_3`
B. `CH_2Cl_2`
C. `"CCl"_4`
D. `CH_3Cl`

Explanation

To solve the question regarding which compound is used in paint removing, we will analyze each of the given options step by step.

### Step 1: Identify the Compounds
We have four compounds to evaluate:
1. CHCl3 (Chloroform)
2. CH2Cl2 (Dichloromethane)
3. CCl4 (Tetrachloromethane)
4. CH3Cl (Methyl Chloride)

### Step 2: Evaluate CHCl3 (Chloroform)
- Chloroform (CHCl3) is known for its use as a solvent and as an anesthetic.
- It is not commonly used for paint removal.
- **Conclusion**: CHCl3 is **not** used in paint removing.

### Step 3: Evaluate CH2Cl2 (Dichloromethane)
- Dichloromethane (CH2Cl2) is recognized for its effectiveness as a solvent.
- It is specifically mentioned to be used in paint removal, solvent applications, and metal cleaning.
- **Conclusion**: CH2Cl2 **is** used in paint removing.

### Step 4: Evaluate CCl4 (Tetrachloromethane)
- Tetrachloromethane (CCl4) is primarily used in fire extinguishers and dry cleaning.
- It does not have applications in paint removal.
- **Conclusion**: CCl4 is **not** used in paint removing.

### Step 5: Evaluate CH3Cl (Methyl Chloride)
- Methyl Chloride (CH3Cl) is utilized in refrigeration and the synthesis of synthetic rubber.
- It does not serve a purpose in paint removal.
- **Conclusion**: CH3Cl is **not** used in paint removing.

### Final Conclusion
After evaluating all four compounds, we find that the only compound used in paint removing is **Dichloromethane (CH2Cl2)**. Therefore, the correct answer is:

**Answer: CH2Cl2 (Dichloromethane)**

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