Ethylene on ozonolysis gives

Options

A. Formaldehyde
B. Ethylene ozonide
C. Acetaldehyde
D. `H_(2)O_(2)`

Answer

To solve the question "Ethylene on ozonolysis gives," we will follow these steps:

### Step 1: Understand the Structure of Ethylene
Ethylene, also known as ethene, has the molecular formula C2H4. Its structure can be represented as:
\[ \text{H}_2C=CH_2 \]

### Step 2: Ozonolysis Process
Ozonolysis is a reaction where ozone (O3) is used to cleave double bonds in alkenes. When ethylene undergoes ozonolysis, it reacts with ozone to form an ozonide intermediate.

### Step 3: Formation of Ozonide
When ethylene reacts with ozone, it forms an ozonide. The ozonide is a cyclic compound that contains a five-membered ring with three oxygen atoms and two carbon atoms.

### Step 4: Hydrolysis of Ozonide
The ozonide is then typically hydrolyzed (reacted with water) to yield carbonyl compounds. In the case of ethylene, the ozonide will break down into two molecules of formaldehyde (HCHO).

### Step 5: Final Products
Thus, the final products of the ozonolysis of ethylene are:
\[ 2 \text{HCHO} \]
This means that ethylene on ozonolysis gives two moles of formaldehyde.

### Conclusion
Therefore, the answer to the question is:
**Ethylene on ozonolysis gives formaldehyde (HCHO).**

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