1,2-dibromoethene shows geometrical isomerism.

Explanation

To determine whether 1,2-dibromoethene shows geometrical isomerism, we can follow these steps:

### Step 1: Identify the Structure
1,2-dibromoethene has the molecular formula C2H2Br2. The structure can be represented as follows:
- The two carbon atoms are connected by a double bond (C=C).
- Each carbon atom has one bromine atom attached to it.

### Step 2: Analyze the Double Bond
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