Question

How is ethene prepared from vicinal dihalide ?​

Answer 1

Answer:

When vicinal dihalide is heated with zinc dust, two halide atoms are removed from the compound and ethene is formed. BY THE REDUCTION OF ETHYNE: Under control conditions ethyne adds two H-atoms to form ethene in the presence of Nickel(Ni) at 200oC

Explanation:

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Answer 2

The ethene is prepared from vicinal dihalide by heating it with Zinc dust .

Explanation:

Vicinal dihalides

They are  compounds that have halogens on adjacent carbons.

They  are formed by reacting a  halogen with  alkene.

Alkene

It is an unsaturated hydrocarbon carrying C-C double bond .

Its members are ethene , propene,butene etc

We can convert vicinal dihalide to alkene as explained below :

When vicinal dihalide is heated with zinc dust, two halide atoms are removed from the compound and ethene is formed.

The reaction is shown below in picture :

C₂H₄Br₂  +  Zn ------------------------------------->C₂H₄  + ZnBr₂

(1,2 dibromoethane)   (Zinc)                        (ethene )  (Zinc bromide)