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An organic compound reacted with bromine water to give a colourless solution. The compound is...

Chemistry
JAMB 2009

An organic compound reacted with bromine water to give a colourless solution. The compound is probably an?

  • A. alkene
  • B. alkanal
  • C. alkyl
  • D. alkanone
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Correct Answer: Option A
Explanation

Alkenes react in the cold with pure liquid bromine, or with a solution of bromine in an organic solvent like tetrachloromethane. The double bond breaks, and a bromine atom becomes attached to each carbon. The bromine loses its original red-brown colour to give a colourless liquid.

Alkynes also react with bromine, decolorising it though not as immediate as alkenes.

There is an explanation video available below.


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Explanation Video

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