Butyl-3-iodoheptane
(iv) 1,4-Dibromobut-2-ene
(v) 1-Bromo-4-sec butyl-2-methylbenzene Halogen atoms are more electronegative than carbon, therefore,
carbon-halogen bond of alkyl halide is polarised; the carbon atom bears
a partial positive charge whereas the halogen atom bears a partial
negative charge As we go down the group in the periodic table, the size of halogen
atom increases