When acetaldehyde is heated with Fehling solution, it gives a precipitate of

Options

A. Cu
B. CuO
C. `Cu_(2)O`
D. `Cu+CuO+Cu_(2)O`

Answer

To solve the question "When acetaldehyde is heated with Fehling solution, it gives a precipitate of," we can follow these steps:

### Step 1: Understand the Components
Fehling's solution is a chemical test used to differentiate between aldehydes and ketones. It contains two solutions, Fehling's A (copper(II) sulfate) and Fehling's B (sodium potassium tartrate in a strong alkaline solution).

### Step 2: Identify the Reactant
The reactant in this case is acetaldehyde, which has the chemical formula CH₃CHO. It is an aldehyde.

### Step 3: Reaction Mechanism
When acetaldehyde is heated with Fehling's solution, it undergoes oxidation. The aldehyde group (-CHO) is oxidized to a carboxylic acid (-COOH). In this reaction, the copper(II) ions (Cu²⁺) in the Fehling's solution are reduced to copper(I) oxide (Cu₂O).

### Step 4: Formation of Precipitate
The reduction of Cu²⁺ to Cu⁺ leads to the formation of a colored precipitate. In this case, the precipitate formed is copper(I) oxide (Cu₂O), which appears as a red or yellow solid.

### Step 5: Conclusion
Thus, when acetaldehyde is heated with Fehling's solution, it gives a precipitate of copper(I) oxide (Cu₂O).

### Final Answer
The precipitate formed is **Cu₂O** (copper(I) oxide).

---