Which of the following organic compounds answers to both iodoform test and Fehling's test?

Options

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

Answer

To determine which of the given organic compounds responds to both the Iodoform test and Fehling's test, we will analyze each compound step by step.

### Step 1: Understand the Tests
1. **Fehling's Test**: This test is used to identify aldehydes. When an aldehyde is treated with Fehling's solution (an alkaline solution of copper(II) sulfate), it reduces the copper(II) ions to copper(I) oxide, which forms a red precipitate.
2. **Iodoform Test**: This test is used to identify methyl ketones and secondary alcohols. A positive result is indicated by the formation of a yellow precipitate of iodoform (CHI3) when the compound is treated with iodine in the presence of a base.

### Step 2: Analyze the Given Compounds
The compounds provided are:
- **Ethanol (CH3CH2OH)**
- **Methanol (CH3OH)**
- **Acetaldehyde (CH3CHO)**
- **Propanol (C3H7OH)**

### Step 3: Check Each Compound for Fehling's Test
1. **Ethanol**: It is an alcohol and does not give a positive Fehling's test.
2. **Methanol**: It is also an alcohol and does not give a positive Fehling's test.
3. **Acetaldehyde**: This is an aldehyde and will give a positive Fehling's test, forming a red precipitate.
4. **Propanol**: It is an alcohol and does not give a positive Fehling's test.

### Step 4: Check Each Compound for Iodoform Test
1. **Ethanol**: It is a primary alcohol and does not give a positive Iodoform test.
2. **Methanol**: It does not have a methyl group adjacent to the hydroxyl group and does not give a positive Iodoform test.
3. **Acetaldehyde**: This compound can give a positive Iodoform test because it can be oxidized to form a methyl ketone.
4. **Propanol**: It is a secondary alcohol and can give a positive Iodoform test.

### Step 5: Conclusion
From the analysis:
- **Acetaldehyde (CH3CHO)** gives a positive result for both Fehling's test and Iodoform test.
- **Propanol** gives a positive result for Iodoform test but not for Fehling's test.
- **Ethanol and Methanol** do not give positive results for either test.

Thus, the only compound that answers to both the Iodoform test and Fehling's test is **Acetaldehyde (CH3CHO)**.

### Final Answer
**Acetaldehyde (CH3CHO)** is the compound that answers to both the Iodoform test and Fehling's test.