[en] Reactions involving weakly bound projectiles like ^6,7Li and ⁹Be are known to exhibit many interesting features such as fusion suppression at above barrier energies, absence of threshold anomaly in the real part of optical potential, large alpha particles production etc. There are also few anomalies in fission observables like enhancement of FF angular anisotropies compared to the SSPM calculations, enhancement of the width of the folding angle distributions at below barrier energies for inclusive fission as compared to complete fusion (CF)-fission and also enhancement of peak to valley ratio (P/V) for inclusive fission as compared to ones for CF-fission. In literature, it has been argued that breakup or transfer induced fission is supposed to play a role for the above anomalies. Hence the present thesis work focuses on the study of the effects of projectile breakup on fission by measuring the basic observables like fission fragments angular distributions (FFAD), fission fragments mass distribution (FFMD), fission fragments folding angle distributions (FFFAD) etc. in reactions involving weakly bound projectiles aiming to resolve some of the anomalies in fission observables