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Question

The compound formed when an alcoholic solution of ethylene dibromide is heated with granulated zinc is:


A
ethene
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B
ethyne
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C
ethane
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D
bromoethane
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Solution

The correct option is A ethene
The given reaction is dehalogenation reaction. Zinc removes bromine from ethylene dibromide as zinc bromide and forms ethene.
$$\underset{\text{Ethylene dibromide}}{Br{H}_{2}C-C{H}_{2}Br} + Zn \xrightarrow[alcohol]{heat} {H}_{2}C=C{H}_{2} +Zn{Br}_{2}$$

Chemistry

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