Question

Which of the following reactions is used as a test for unsaturation in organic compound?

Options

• Reaction of Cl₂ with ethene

• Reaction of Br₂ with ethene

• Reaction of Cl₂ with ethane

• Reaction of Br₂ with ethane

Answer 1

Reaction of Br₂ with ethene

Explanation:

This is the Bromine Water Test. Unsaturated compounds like ethene quickly add bromine across their double bond, instantly decolorizing the reddish-brown colour of bromine.