After a positive test, the bromine water becomes what color?

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Prepare for the IGCSE Organic Chemistry Exam. Study with flashcards and multiple choice questions, each question has hints and explanations to ensure you understand the core concepts. Get ready for your test with confidence!

Multiple Choice

After a positive test, the bromine water becomes what color?

Explanation:
Bromine water is orange-brown because it contains Br2. A positive test for unsaturation happens when a compound with a carbon–carbon double bond reacts with Br2, adding across the double bond to form a dibromo compound. This reaction uses up the Br2, so the colored bromine is removed and the solution turns colorless. If there’s no double bond, as with alkanes, the bromine water stays orange-brown.

Bromine water is orange-brown because it contains Br2. A positive test for unsaturation happens when a compound with a carbon–carbon double bond reacts with Br2, adding across the double bond to form a dibromo compound. This reaction uses up the Br2, so the colored bromine is removed and the solution turns colorless. If there’s no double bond, as with alkanes, the bromine water stays orange-brown.

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