Acetic acid is the only product of ozonolysis of

Options

A. `1-`Butyne
B. Dimethyl acetylene
C. Ethyl acetylene
D. `2-` Butene

Explanation

To determine which compound yields acetic acid as the only product of ozonolysis, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Ozonolysis:**
Ozonolysis is a reaction where ozone (O3) cleaves double or triple bonds in alkenes or alkynes, resulting in the formation of carbonyl compounds (aldehydes or ketones) that can further undergo hydrolysis to yield carboxylic acids.

2. **Analyzing Option A: Butyne (1-butyne):**
- Structure: CH3-CH2-C≡CH
- Upon ozonolysis, the triple bond will break and form two carbonyl groups.
- The products after hydrolysis will be:
- CH3-CH2-COOH (butanoic acid)
- HCHO (formaldehyde)
- Result: Not acetic acid.

3. **Analyzing Option B: Dimethylacetylene (2-butyne):**
- Structure: CH3-C≡C-CH3
- Upon ozonolysis, the triple bond will break and form two carbonyl groups.
- The products after hydrolysis will be:
- CH3-COOH (acetic acid)
- CH3-COOH (acetic acid)
- Result: Both products are acetic acid.

4. **Analyzing Option C: Ethylacetylene (1-butyne):**
- Structure: CH3-CH2-C≡C-H
- This compound is similar to butyne.
- Upon ozonolysis, it will yield the same products as in Option A.
- Result: Not acetic acid.

5. **Analyzing Option D: 2-butyne:**
- Structure: CH3-C≡C-CH3
- This compound is the same as Option B.
- Upon ozonolysis, the products will be:
- CH3-COOH (acetic acid)
- CH3-COOH (acetic acid)
- Result: Both products are acetic acid.

### Conclusion:
After analyzing all options, we find that **Option B (Dimethylacetylene)** is the only compound that yields acetic acid as the sole product of ozonolysis.

### Final Answer:
**Option B: Dimethylacetylene is the only compound that gives acetic acid as the product of ozonolysis.**

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