Which of the following is an addition reaction ?
H2C=CH2 + X2 → H−H|C|H−H|C|H−X
What is an addition reactions?
→ The organic reaction in which atoms or group of atoms react to form a single product having all the atoms of the combining units.
Therefore,
H2C=CH2 + X2 → H−H|C|H−H|C|H−X
is an addition reaction.