Which of the following is used as a refrigerant ?

Options

A. `"COCl"_(2)`
B. `"CCl"_(4)`
C. `CF_(4)`
D. `CF_(2) Cl_(2)`

Answer

To solve the question "Which of the following is used as a refrigerant?" we will analyze the given options one by one.

### Step 1: Identify the options
The options provided are:
1. CuCl2
2. CCl4
3. CF4
4. CF2Cl2

### Step 2: Understand what a refrigerant is
A refrigerant is a substance used in a refrigeration cycle that absorbs heat from the environment and releases it elsewhere, effectively cooling the area.

### Step 3: Analyze each option
1. **CuCl2 (Copper(II) chloride)**: This is an inorganic compound typically used in chemical reactions and not as a refrigerant.

2. **CCl4 (Carbon tetrachloride)**: While it has been used in the past, it is not commonly used as a refrigerant today due to its environmental impact and toxicity.

3. **CF4 (Tetrafluoromethane)**: This is a gas that is used in some applications, but it is not primarily known as a refrigerant.

4. **CF2Cl2 (Dichlorodifluoromethane)**: This compound is widely recognized as a refrigerant, specifically known as Freon 12. It is commonly used in refrigeration and air conditioning systems.

### Step 4: Conclusion
Based on the analysis, the correct answer is **CF2Cl2**, which is used as a refrigerant.

### Final Answer
The refrigerant from the given options is **CF2Cl2** (Dichlorodifluoromethane).

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