Answer:
The three key factors that influence E1 elimination reactions are (a) the stability of the carbocation, (b) the nature of the leaving group, and (c) the solvent type.
The rate of the E2 reaction increases as the strength of the base increases.In general, heavy negatively charged bases such as OH are used out in E2 reaction.The rate of E2 reactions is increased by Polar aprotic solvents.The stronger the leaving group, the quicker the E2 reaction.The reaction rate follows the order, R-I > R-Br > R-Cl > R-F :