The acids which do not contain - COOH group are .

Options

A. propanoic acid
B. piciric acid
C. p - toluenesulphonic acid
D. lactic acid

Answer

To determine which acids do not contain the -COOH (carboxylic acid) group, we need to analyze the given options one by one.

### Step-by-Step Solution:

1. **Identify the first option: Propanoic Acid**
- Structure: Propanoic acid is represented as CH3-CH2-COOH.
- Analysis: This structure clearly shows the presence of the -COOH group.
- Conclusion: Propanoic acid contains the -COOH group, so it is not our answer.

2. **Identify the second option: Picric Acid**
- Structure: The structure of picric acid can be drawn as follows:
- It has three nitro groups (NO2) and a hydroxyl group (OH) attached to a benzene ring.
- Analysis: The structure does not contain a -COOH group, only an -OH group.
- Conclusion: Picric acid does not contain the -COOH group, so it is a valid option.

3. **Identify the third option: Paratoluenesulfonic Acid**
- Structure: The structure can be represented as:
- A toluene ring with a sulfonic acid group (-SO3H) attached.
- Analysis: This structure also does not have a -COOH group; it contains a sulfonic acid group instead.
- Conclusion: Paratoluenesulfonic acid does not contain the -COOH group, so it is also a valid option.

4. **Identify the fourth option: Lactic Acid**
- Structure: Lactic acid can be represented as CH3-CHOH-COOH.
- Analysis: This structure clearly shows the presence of the -COOH group.
- Conclusion: Lactic acid contains the -COOH group, so it is not our answer.

### Final Answer:
The acids that do not contain the -COOH group are:
- **Picric Acid**
- **Paratoluenesulfonic Acid**