Solar flares are the most effective events observed in solar atmosphere which involves
particle acceleration, plasma heating and the immense mass ejection. Triggering of such events
includes many possible scenarios like flux emergence, cancellation, mass-motion, helicity, small-jets
etc. This thesis is aimed for the detailed analysis of the initiation mechanism and the energy build-up
and release processes causing solar eruptions using the ground-based as well as space-based data sets.
The chapters in the thesis involves analysis of the triggering of solar flares (large as well as small
flares), associated phenomena (like CME properties and associated radio bursts) and the properties of
flare kernels. In one case of small flare, spray/surge like ejection produce Type II radio burst with a
shock by a slow CME. The another case involves the splitting in the filament structure caused by the
internal reconnection which later underwent partial filament eruption accompanied by the current sheet
formation. Also, The shifting in the flare kernels is explained by the coupling of energy driven by
Lorentz force. Although, The shock waves behavior in the flare kernels is been analyzed which could
provide important indications for the origin of white-light kernels. We discuss our results in the light of
existing theories.