Which reagent can be used to test for the presence of alkenes?
Correct Answer: Bromine water
- Step 1: Understand that alkenes are compounds that have a double bond between carbon atoms.
- Step 2: Know that bromine water is a solution of bromine in water, which is reddish-brown in color.
- Step 3: When bromine water is added to a sample containing alkenes, a chemical reaction occurs.
- Step 4: The double bond in the alkene reacts with bromine, causing the reddish-brown color to disappear.
- Step 5: If the color of bromine water changes from reddish-brown to colorless, it indicates the presence of alkenes.
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