What happens when ethene reacts with chlorine.

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Solution

Ethene has the molecular formula $(C_{2} H_{4})$ because it follows the general formula of alkenes.
The halogenation of alkene is a reaction in which a dihalide is added to a molecule after the double bond linked between Carbon $(C)$ atoms has been broken.
The addition of halogen molecules takes place from both sides of the reactant molecule to form the halogenated product.
The chlorination reaction of Ethene $(C_{2} H_{4})$ forms the 1,2-dichloroethane as the major product.
The chlorination reaction of Ethene can be written as:
${CH}_{2} = {CH}_{2} + Cl - Cl \to {ClCH}_{2} - {CH}_{2} Cl (Ethene) (Chlorine) (1, 2 - dichloroethane)$

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