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Question

Consider the following reaction and identify X and Y.
CH3CH2CH2Ialc.KOH−−−−X
CH3CH=CH2Y

A
X=CH3CH=CH2
Y=CH3CH|BrCH2Br
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B
X=CH3CH2CH2OH
Y=CH3CH2CH2Br
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C
X=CH3CH|OHCH3
Y=CH3CH|BrCH3
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D
X=CH3CH=CH2
Y=CH3CH2CH2Br
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Solution

The correct option is A X=CH3CH=CH2
Y=CH3CH|BrCH2Br
Alc KOH results in elimination reaction of alkylhalide to give alkene.This is β elimination.
refer to image.
Bromination of alkene occur to give dibromo compound.

1069450_937646_ans_05727276dfec471ba9138ca59490aa08.PNG

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