How does acetylene react with the following reagents? Give the corresponding equations and name the product formed in the reactions?
Halogens

Explanation

Addition of halogens : Acetylene undergoes addition reaction with halogens to give `1,1,2,2` tetra haloethane. Dihalo alkene is formed in the first step which then adds on another molecule of halogen to give tetra halo ethane.
`H - C -= C - H + Cl _(2) overset( C Cl _(4)) to H - underset( Cl ) underset( |) (C )- underset( Cl ) underset(|) (C) - H ` 1, 2- dichloroethane
`H - underset ( Cl ) underset( |) (C) = underset( Cl ) underset(|) (C ) - H + Cl _(2) overset( C Cl _(4)) to H - underset( Cl ) underset( |) overset( Cl ) overset(|) (C) - underset( Cl ) underset(|) overset(Cl) overset(|) (C) - H ` 1,1,2,2- tetra chloroethane (westorn)