Detailed insight into the dynamics of chemical reactions, nonreactive collisions, and molecular photofragmentation processes is provided by measurements of the translational-andinternal-energy, and spacial angular distributions of the products. With a tunable vacuumultravioletlaser, it becomes appealing to study the chemical reaction dynamics involving lightatoms (hydrogen, oxygen, sulfur, chlorine) and molecules. In this article, we have describedrecent progress in the field of chemical reactions (translational energy dependence of reactivecross sections, lifetime of the intermediate complex, stereochemistry, site-specificity), nonreactivecollisions (velocity and spacial anisotropy relaxation, intersystem crossing, intramultiplettransition), photodissociation (site-specificity, primary processes, adiabaticity of potentialcurves, vector correlation), and nonadiabatic coupling among electronic states.