Write a test to detect the presence of double bond in a molecule.

Explanation

To detect the presence of a double bond in a molecule, you can perform the bromine water test. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Gather Materials**:
- Obtain bromine water (a solution of bromine in water, which is brown in color).
- Prepare the sample solution that you want to test for the presence of double bonds.

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