Question detail
What colour change is observed when bromine water reacts with an alkene?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Carbon compounds as fuels and feedstock
Question
What colour change is observed when bromine water reacts with an alkene?
Answer
The orange–brown colour of the bromine water disappears, giving a colourless solution.
Explanation
The question tests recall of the specific visual change that indicates the presence of a carbon–carbon double bond in an alkene, a key diagnostic test in organic chemistry.
Common mistake
Bromine Water Reaction Misunderstanding
Students often think that bromine water turns clear when it reacts with an alkene.
Students should remember that bromine water actually changes from brown to colourless when it reacts with an alkene.
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