Explain the reaction of ethene and ethyne with bromine water. How is this reaction used as test for unsaturation?

Explanation

### Step-by-Step Solution:

**Step 1: Understanding the Reactants**
- Ethene (C2H4) and ethyne (C2H2) are both hydrocarbons that contain carbon and hydrogen. Ethene has a double bond (C=C), while ethyne has a triple bond (C≡C).
- Bromine water is a solution of bromine in water, which has a reddish-brown color due to the presence of bromine molecules.

**Step 2: Reaction of Ethene with Bromine Water**
- When bromine water is added to ethene, the double bond in ethene reacts with bromine.
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