Liebig test is used ot estimate

Options

A. H
B. C
C. C and H both
D. N

Answer

### Step-by-Step Solution:

1. **Understanding the Liebig Test**: The Liebig test is a method used to estimate the amounts of certain elements in organic compounds. Specifically, it focuses on determining the quantities of carbon and hydrogen.

2. **Process of the Liebig Test**: In this test, a known mass of the organic compound is heated in the presence of oxygen. This combustion reaction produces carbon dioxide (CO₂) and water (H₂O).

3. **Collecting Products**: After the combustion, the produced carbon dioxide and water are collected and weighed.

4. **Calculating Carbon Content**: The weight of the carbon dioxide produced is used to calculate the percentage of carbon in the original organic compound. This is done using the molar mass of carbon and the stoichiometry of the reaction.

5. **Calculating Hydrogen Content**: Similarly, the weight of the water produced is used to determine the percentage of hydrogen in the organic compound. The molar mass of water and the stoichiometry of the reaction are used for this calculation.

6. **Conclusion**: Since the Liebig test allows for the estimation of both carbon and hydrogen in the organic compound, the correct answer to the question is option C: carbon and hydrogen both.

### Final Answer:
The Liebig test is used to estimate **carbon and hydrogen** both (Option C).