Which reagent is used to test for the presence of alkenes?

Which reagent is used to test for the presence of alkenes?

Step 1: Understand that alkenes are a type of hydrocarbon that contain a double bond between carbon atoms.
Step 2: Know that certain reagents can react with the double bond in alkenes.
Step 3: Learn that bromine water is one reagent that can be used to test for alkenes. It changes color when it reacts with the double bond.
Step 4: Recognize that potassium permanganate is another reagent that can test for alkenes. It also changes color when it reacts with the double bond.
Step 5: Conclude that both bromine water and potassium permanganate are effective tests for the presence of alkenes.

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