Question
What happens when Br2 is added to (i) C2H4 (ii) C2H2
Answer
When Br2 is added to C2H4 (ethylene), the double bond of C2H4 breaks and forms a halogen derivative (1,2-dibromoethane) as shown below:
When Br2 is added to C2H2 (acetylene), it undergoes an addition reaction and forms tetrabromoethane (C2H2Br4) as shown below: