Which of the following compounds is not formed in the pyrolysis of Hexane

Options

A. `C_(6)H_(12)`
B. `C_(3)H_(6)`
C. `C_(2)H_(4)`
D. `C_(2)H_(2)`

Answer

To determine which compound is not formed during the pyrolysis of hexane, we need to understand the process of pyrolysis (or cracking) and the types of products that can be generated from it.

### Step-by-Step Solution:

1. **Understanding Pyrolysis**:
- Pyrolysis, also known as cracking, involves the thermal decomposition of hydrocarbons at high temperatures. This process breaks down larger hydrocarbons into smaller ones, typically yielding alkanes, alkenes, and sometimes alkynes.

2. **Identifying the Reactant**:
- The compound we are considering is hexane, which has the molecular formula C6H14.

3. **Possible Products from Hexane**:
- During pyrolysis, hexane can decompose into various smaller hydrocarbons. Common products include:
- C6H12 (Hexene)
- C4H8 (Butene)
- C2H6 (Ethane)
- C3H6 (Propene)
- C2H4 (Ethylene)
- CH4 (Methane)

4. **Analyzing the Options**:
- We need to evaluate the given options to identify which compound is not produced during the pyrolysis of hexane. The options typically include:
- C6H12 (Hexene)
- C4H8 (Butene)
- C2H6 (Ethane)
- C2H2 (Acetylene)

5. **Determining the Incorrect Compound**:
- From the analysis, we see that:
- C6H12, C4H8, C2H6, and C3H6 can be formed during pyrolysis.
- C2H2 (Acetylene) is an alkyne and is not typically produced in the pyrolysis of hexane, as the process mainly yields alkanes and alkenes.

6. **Conclusion**:
- Therefore, the compound that is not formed during the pyrolysis of hexane is **C2H2 (Acetylene)**.

### Final Answer:
The compound that is not formed in the pyrolysis of hexane is **C2H2 (Acetylene)**.