KEAM 2015 Physics and Chemistry Paper

When halogen atom attached with adjacent position of unsaturation, the position is called allylic position and compound is called allylic halide.
In 3 -bromopropene, halogen atom (bromine) attached with adjacent position of double bond, so compound is called allylic bromide.
CH2=CH−CH2−Br
3-bromopropene
(Allylic halide)