The formation of alkene from alkyl halide is an example of

Options

A. Addition
B. Elimination
C. Substitution
D. (a) and (c )

Explanation

To determine the type of reaction that describes the formation of an alkene from an alkyl halide, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- Start with an alkyl halide, which can be represented as R-X, where R is an alkyl group and X is a halogen (like Cl, Br, or I).

2. **Understand the Reaction Type**:
- The process of forming an alkene from an alkyl halide involves the removal of atoms or groups from the alkyl halide. This is known as an elimination reaction.

3. **Identify the Specific Elimination**:
- In this case, we are specifically looking at the removal of a halogen (X) from the alpha carbon and a hydrogen (H) from the beta carbon. This type of elimination is often referred to as β-elimination.

4. **Write the Reaction**:
- For example, if we take 1-bromopropane (CH3-CH2-CH2Br) and treat it with a strong base, we can eliminate HBr to form propene (CH3-CH=CH2).
- The reaction can be summarized as:
\[ \text{R-X} \rightarrow \text{R}=\text{C} + \text{HX} \]
- Here, R-X is the alkyl halide, R=C is the alkene formed, and HX is the hydrogen halide eliminated.

5. **Conclusion**:
- Therefore, the formation of an alkene from an alkyl halide is an example of an elimination reaction, specifically a β-elimination reaction.

### Final Answer:
The formation of alkene from alkyl halide is an example of **elimination reaction**.

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