Acrolin test is negative for

Options

A. Oils
B. Fats
C. Proteins
D. Lipids

Explanation

To solve the question "Acrolin test is negative for," we need to understand the context of the acrolin test and what substances it is used to identify.

### Step-by-Step Solution:

1. **Understanding the Acrolin Test**:
- The acrolin test is a chemical test used to detect the presence of lipids, fats, and oils. When these substances are heated in the presence of potassium hydrogen sulfate (KHSO4), acrolin (also known as 2-propenal) is produced.

2. **Identifying the Substances**:
- The options provided are oils, fats, proteins, and lipids. We need to determine which of these substances does not produce acrolin when subjected to the acrolin test.

3. **Analyzing Each Option**:
- **Oils**: These are a type of lipid and will react positively in the acrolin test.
- **Fats**: Similar to oils, fats are also lipids and will also produce acrolin in the test.
- **Lipids**: This is a broad category that includes both fats and oils, and they will also yield a positive result in the acrolin test.
- **Proteins**: Proteins do not contain the structure necessary to produce acrolin when subjected to the acrolin test.

4. **Conclusion**:
- Since the acrolin test is specifically designed to detect lipids, fats, and oils, the substance that does not yield a positive result is **proteins**. Therefore, the acrolin test is negative for proteins.

### Final Answer:
The acrolin test is negative for **proteins**.