The dehydrohalogenation of a 1, 1-dihalide results in the formation of an ...............

Explanation

To solve the question regarding the dehydrohalogenation of a 1,1-dihalide, we will follow these steps:

### Step 1: Understand the structure of 1,1-dihalide
1,1-dihalides are compounds where two halogen atoms are attached to the same carbon atom. For example, let's consider 1,1-dibromoethane (C2H4Br2), where both bromine atoms are attached to the first carbon atom.

**Hint:** Identify the structure of the 1,1-dihalide to understand the reaction process.

### Step 2: Identify the reaction conditions
...