Bromination of an alkane as compared to chlorination proceeds (1) at a slower rate (2) at a faster rate (3) with equal rate (4) with equal or different rate depending upon temperature.
Dear Student,
Halogenation reaction of alkane occur with halogens like chlorine, fluorine, bromine etc. Usually, chlorine is more reactive towards the alkane than bromine , hence chlorine react faster than bromine. So bromination proceeds with much slower rate as compared to chlorination.
Hence, option 1 is correct.
Regards,