1, 2-dibromoethane gives ______ by treating with $Z n$ dust under suitable conditions.

ethane

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ethene

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ethyne

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none of the above

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Solution

The correct option is A ethene
During the reaction of 1, 2-dibromoethane with Zn dust, dehalogenation of the alkane takes place to form ethene as:
$(B r) C H_{2} - C H_{2} (B r) + Z n \to C H_{2} = C H_{2} + Z n B r_{2}$

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