Ozone give carbonyl compounds with :

Options

A. alkyl chlorides
B. alkanes
C. alkenes followed by decomposition with `Zn//H_(2)O`.
D. alkynes followed by decomposition with `Zn//H_(2)O`.

Explanation

To solve the question "Ozone gives carbonyl compounds with:", we will analyze the reaction of ozone (O3) with different types of organic compounds, particularly alkenes and alkynes, through the process known as ozonolysis.

### Step-by-Step Solution:

1. **Understanding Ozone (O3)**:
- Ozone is a triatomic molecule consisting of three oxygen atoms. It is known for its ability to react with alkenes and alkynes to form carbonyl compounds.

**Hint**: Recall that ozone is a powerful oxidizing agent.

2. **Ozonolysis Reaction**:
- The ozonolysis reaction involves the cleavage of carbon-carbon double bonds (C=C) or triple bonds (C≡C) in alkenes and alkynes, respectively, upon treatment with ozone.

**Hint**: Remember that ozonolysis is a specific reaction that occurs with unsaturated hydrocarbons.

3. **Reaction with Alkenes**:
- When an alkene (C=C) reacts with ozone, it forms an ozonide intermediate. This ozonide can then be treated with zinc (Zn) and water (H2O) to yield carbonyl compounds (aldehydes or ketones).
- The general reaction can be summarized as:
\[ \text{Alkene} + O_3 \rightarrow \text{Ozonide} \rightarrow \text{Carbonyl Compounds (C=O)} \]

**Hint**: Focus on the fact that alkenes lead to carbonyl compounds after ozonolysis.

4. **Reaction with Alkynes**:
- Similarly, when an alkyne (C≡C) undergoes ozonolysis, it also forms an ozonide. Upon treatment with Zn and H2O, this ozonide can yield dicarbonyl compounds (two C=O groups) and can further hydrolyze to form carboxylic acids.
- The reaction can be summarized as:
\[ \text{Alkyne} + O_3 \rightarrow \text{Ozonide} \rightarrow \text{Dicarbonyl Compounds} \rightarrow \text{Carboxylic Acids} \]

**Hint**: Note that alkynes can form dicarbonyl compounds, which may further convert to carboxylic acids.

5. **Identifying Carbonyl Compounds**:
- Carbonyl compounds are characterized by the presence of a carbon atom double-bonded to an oxygen atom (C=O). This includes aldehydes and ketones.
- In the context of the question, we are specifically looking for reactions that yield carbonyl compounds directly.

**Hint**: Differentiate between carbonyl compounds and carboxylic acids.

6. **Conclusion**:
- Based on the analysis, ozone gives carbonyl compounds primarily when reacting with alkenes. The ozonolysis of alkenes leads directly to carbonyl compounds, while alkynes lead to dicarbonyl compounds and potentially carboxylic acids.
- Therefore, the correct option is that ozone gives carbonyl compounds with **alkenes followed by decomposition with Zn and H2O**.

**Final Answer**: Ozone gives carbonyl compounds with **alkenes**.