Ethene plus bromine water yields which product?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Ethene plus bromine water yields which product?

Explanation:
Alkenes react by adding halogen across the carbon–carbon double bond. Bromine is an electrophile, so the π bond opens and a bromine atom attaches to each carbon, giving a vicinal dibromide. For ethene this forms 1,2-dibromoethane (C2H4Br2). The bromine water decolorizes as Br2 is consumed in the reaction, which is why this test is used to detect unsaturation. So the product is 1,2-dibromoethane.

Alkenes react by adding halogen across the carbon–carbon double bond. Bromine is an electrophile, so the π bond opens and a bromine atom attaches to each carbon, giving a vicinal dibromide. For ethene this forms 1,2-dibromoethane (C2H4Br2). The bromine water decolorizes as Br2 is consumed in the reaction, which is why this test is used to detect unsaturation. So the product is 1,2-dibromoethane.

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