Which of the following organic compound exhibits positive Fehling test as well as iodoform test?

Options

A. Methanal
B. Ethanol
C. Propanone
D. Ethanal

Answer

To solve the question of which organic compound exhibits both a positive Fehling test and a positive iodoform test, we can follow these steps:

### Step 1: Understand the Tests
- **Fehling Test**: This test is used to identify aldehydes. Compounds that contain the aldehyde functional group (–CHO) will give a positive result.
- **Iodoform Test**: This test is used to identify methyl ketones (compounds with the structure –COCH3) and some alcohols that can be oxidized to form such ketones.

### Step 2: Analyze the Given Compounds
We need to evaluate each compound provided in the question:

1. **Methanol (HCHO)**:
- Structure: HCHO (aldehyde)
- Fehling Test: Positive (contains –CHO)
- Iodoform Test: Negative (does not contain –COCH3)

2. **Ethanol (CH3CH2OH)**:
- Structure: CH3CH2OH (alcohol)
- Fehling Test: Negative (does not contain –CHO)
- Iodoform Test: Negative (does not contain –COCH3)

3. **Propanone (CH3COCH3)**:
- Structure: CH3COCH3 (ketone)
- Fehling Test: Negative (does not contain –CHO)
- Iodoform Test: Positive (contains –COCH3)

4. **Ethanol (CH3CHO)**:
- Structure: CH3CHO (aldehyde)
- Fehling Test: Positive (contains –CHO)
- Iodoform Test: Positive (contains –COCH3)

### Step 3: Identify the Correct Compound
From the analysis:
- Methanol gives a positive Fehling test but negative iodoform test.
- Ethanol gives negative results for both tests.
- Propanone gives a positive iodoform test but negative Fehling test.
- Ethanol (the aldehyde) gives a positive result for both tests.

### Conclusion
The compound that exhibits both a positive Fehling test and a positive iodoform test is **Ethanol (CH3CHO)**.

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