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STD 11 - 9. Hydricarbon — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 9. Hydricarbon4 Marks
MCQ
When ethene reacts with bromine, it forms
  • A
    Chloroethane
  • ✓
    Ethylene dibromide
  • C
    $1 $ bromopropane
  • D
    $1,2-$dichloroethene
✓

Answer

Correct option: B.
Ethylene dibromide
b
The bromine loses its original red-brown colour to give a colourless liquid. In the case of the reaction with ethene,

$1,2$-dibromoethane is formed,also know as ethylene dibromide. This decolourisation of bromine is often used as a test for a carbon-carbon double bond.

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