1-Butyne on reductive ozonolysis gives.

Options

A. `CH_(3)CH_(2)CH_(2)COOH`
B. `2C H_(3)COOH`
C. `CH_(3)CH_(2)COCHO`
D. `CH_(3)COOH+CH_(3)CHO`

Answer

To determine the product of the reductive ozonolysis of 1-butyne, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of 1-Butyne**:
- 1-Butyne has the molecular formula C₄H₆ and its structure can be represented as:
\[ \text{CH}_3-\text{C} \equiv \text{C}-\text{H} \]
- This shows a triple bond between the second and third carbon atoms.

2. **Ozonolysis Reaction**:
- When 1-butyne undergoes ozonolysis, ozone (O₃) reacts with the triple bond. The reaction involves the formation of an ozonide intermediate.
- The ozonide structure can be represented as:
\[ \text{CH}_3-\text{C}(\text{O})-\text{C}(\text{O})-\text{H} \]
- Here, the triple bond is converted into two carbonyl groups (C=O).

3. **Reduction of Ozonide**:
- In reductive ozonolysis, the ozonide is reduced typically using zinc (Zn) and water (H₂O) or another reducing agent.
- The ozonide will break down to yield aldehydes or ketones. In this case, the ozonide will yield:
\[ \text{CH}_3-\text{CH}_2-\text{C}(\text{O})-\text{H} \quad \text{and} \quad \text{H}-\text{C}(\text{O})-\text{H} \]
- This results in the formation of butanal (an aldehyde) and acetaldehyde (another aldehyde).

4. **Final Products**:
- The final products of the reductive ozonolysis of 1-butyne are:
\[ \text{CH}_3-\text{CH}_2-\text{C}(\text{O})-\text{H} \quad \text{(butanal)} \quad \text{and} \quad \text{H}-\text{C}(\text{O})-\text{H} \quad \text{(acetaldehyde)} \]

### Conclusion:
The products of the reductive ozonolysis of 1-butyne are butanal and acetaldehyde.