Unbranched alkenes on ozonolysis give -

Options

A. Only ketone
B. Only aldehydes
C. Aldehydes & ketone
D. All of the above

Answer

To solve the question regarding the products formed from the ozonolysis of unbranched alkenes, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Ozonolysis**: Ozonolysis is a reaction where ozone (O3) reacts with alkenes to form carbonyl compounds. The reaction typically involves breaking the double bond of the alkene.

2. **Identifying an Unbranched Alkene**: An unbranched alkene can be represented as R-CH=CH2, where R is a hydrocarbon chain that does not have any branches. For example, we can consider butene (CH2=CH-CH2-CH3).

3. **Breaking the Double Bond**: In the ozonolysis process, we break the double bond of the alkene. For our example of butene, we break the double bond between the two carbon atoms.

4. **Adding Ozone**: After breaking the double bond, we add ozone (O3) to the resulting fragments. This leads to the formation of two carbonyl compounds.

5. **Formation of Products**: The products formed from the ozonolysis of an unbranched alkene will be:
- An aldehyde from the terminal carbon (R-CHO)
- Another aldehyde from the other terminal carbon (if applicable)

For example, in the case of butene, ozonolysis will yield:
- CH3-CHO (acetaldehyde)
- CH2=O (formaldehyde)

6. **Conclusion**: Therefore, the ozonolysis of an unbranched alkene will yield only aldehydes as products.

### Final Answer:
Unbranched alkenes on ozonolysis give aldehydes.

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