Alkane hydrocarbons will not cause dissolution of bromine because alkanes do not have double bonds so they will not undergo addition reactions. Since alkanes do not have double bonds the red color of bromine does not change. The reaction that may occur in alkanes with bromine is a substitution reaction.
Addition reactions are reactions that break a double bond. It can be used to distinguish alkenes from alkynes. This recognition reaction is carried out by adding bromine which is red brown. The addition reaction was indicated by the disappearance of the red-brown color from the bromine. The addition reaction was indicated by the disappearance of the red-brown color from the bromine.
#SPJ4
