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

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

Options:

  1. Bromine water
  2. Silver nitrate
  3. Sodium hydroxide
  4. Hydrochloric acid

Correct Answer: Bromine water

Solution: 

Bromine water is used to test for alkenes, as it will decolorize in their presence.

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

Practice Questions

Q1
Which reagent is commonly used to test for the presence of alkenes?
  1. Bromine water
  2. Silver nitrate
  3. Sodium hydroxide
  4. Hydrochloric acid

Questions & Step-by-Step Solutions

Which reagent is commonly used to test for the presence of alkenes?
Correct Answer: Bromine water
  • Step 1: Understand what alkenes are. Alkenes are a type of hydrocarbon that contain at least one double bond between carbon atoms.
  • Step 2: Learn about bromine water. Bromine water is a solution of bromine in water, and it has a reddish-brown color.
  • Step 3: Know the test for alkenes. When bromine water is added to a substance that contains alkenes, the double bond reacts with bromine.
  • Step 4: Observe the color change. If alkenes are present, the reddish-brown color of bromine water will disappear, indicating a positive test.
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