Which of the following organic compound is used in chemical analysis?
Benzoic acid
Glacial acetic acid
Trichloro acetic acid
Sulphuric acid

Options

A. Benzoic acid
B. Glacial acetic acid
C. Trichloro acetic acid
D. Sulphuric acid

Answer

To determine which of the following organic compounds is used in chemical analysis, we need to analyze each option provided:

1. **Benzoic Acid**:
- **Formula**: C6H5COOH
- **Uses**: Primarily used in industries and as a preservative. It is not specifically known for its use in chemical analysis.

2. **Glacial Acetic Acid**:
- **Formula**: CH3COOH
- **Uses**: Commonly used in cooking and as a solvent. It is not primarily used for chemical analysis.

3. **Trichloroacetic Acid**:
- **Formula**: C2HCl3O2
- **Uses**: This compound is specifically used in biochemistry for the analysis and detection of macromolecules. It is well-known for its role in chemical analysis.

4. **Sulphuric Acid**:
- **Formula**: H2SO4
- **Uses**: Primarily used in metal cleaning and as a dehydrating agent. It is not specifically used for chemical analysis in the context of organic compounds.

After evaluating all the options, we find that **Trichloroacetic Acid** is the compound used in chemical analysis, particularly for the detection of macromolecules.

### Final Answer:
The organic compound used in chemical analysis is **Trichloroacetic Acid**.

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