Which of the following types of reactions takes place between C 2 H 4 and

Explanation

The reaction between C₂H₄ (ethylene) and halogens is anaddition reaction, which is the correct answer (Option B). In an addition reaction, the halogen molecules break the double bond in ethylene, and the halogen atoms bond to the carbon atoms. This process results in the formation of a new compound with a single bond between the carbon atoms.

For example, when ethylene reacts with chlorine (Cl₂), the following addition reaction occurs:

\(C_2H_4 + Cl_2 \rightarrow C_2H_4Cl_2\)

The product formed is 1,2-dichloroethane, and the double bond in ethylene has been replaced with single bonds.

It is important to note the differences between the other options and the correct answer:

Substitution reactions involve the replacement of one atom or group of atoms with another, while maintaining the overall structure of the molecule. This type of reaction is common with saturated hydrocarbons, such as alkanes.

Polymerization reactions involve the combination of many smaller molecules (monomers) to form a larger molecule (polymer). While ethylene can undergo polymerization to form polyethylene, this is not the reaction that takes place with halogens.

Oxidation reactions involve the loss of electrons, often through the addition of oxygen or the removal of hydrogen atoms. The reaction between ethylene and halogens does not involve oxidation.