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Q.
$CH_3CH_2CH_2B \xrightarrow[\text{alcohol}]{KOH} CH_3CH = CH_2$
The above reaction is an example of:
Haloalkanes and Haloarenes
Solution:
The given reaction is an example of elimination reaction in the presence of alcoholic KOH. One molecule of HBr is eliminated from alkyl halide to give alkene.