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From which one of the following can both ethylene and acetylene be prepared in a single step reaction?A. `CH_3CH_2OH`B. `BrCH_2CH_2Br`C. `CH_3CH_2Br`D. `BrCH_2CH_2OH`

Answer» Correct Answer - B
Ethylene is obtained through dehalogenation while acetylene is obtained thorough a double dehydrohalogenation.
`CH-=CHunderset((2)" "H_(2)//H^(+))overset((1)" "NaNH_(2)//("excess"))larrBrCH_(2)CH_(2)Brunderset(CH_(3)OH,Delta)overset(Zn)toCH_(2)=CH_(2)`


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