We report here the results of dissociation of multiple charged methanol and acetylene molecules in collision with 1.2 MeV Ar⁸⁺ projectiles. We observed a wide range of dissociation products from the TOF spectrum starting from undissociated molecular ions, fragments losing an hydrogen atom due to breakage of C–H and/or O–H bonds, to complete rupture of C–C and C–O skeletons for the respective molecules. From the coincidence map of the fragments, we could separate out the different dissociation channels between carbon and oxygen ionic fragments as well as complete two-body dissociation events. The most striking feature in the breakup of CH₃OH is the formation of H₂⁺ and H₃⁺ due to intramolecular rearrangement of the C–H bonds within the methyl group. In dissociative ionization studies of C₂H₂, we observed a diatom-like behaviour of the C–C charged complex as evidenced from the measured slopes of the coincidence islands for carbon atomic charged fragments and theoretical values determined from the charge and momentum distribution of the correlated particles. The shape and orientation of the islands give further information about the momentum balance in the fragmentation process in two-body dissociation.