Introduction: Application of microwave irradiation is a relatively new development in materials processing. Recent development of microwave digestion for extremely acidic conditions like high temperatures __ampersandsignndash; pressures gives more rapid, efficient and precise digestion. Methodology: This study optimizes the temperature and time, for dissolution of silica under acidic condition using microwave irradiation. The etched silica can be utilized for the synthesis of new species of aluminosilicates through various techniques like precipitation/evaporation. Result and Discussion: In our study, we have synthesized fly ash zeolite by using the microwave acid digestion method. This calls for utilization of industrial byproduct-fly ash in zeolite synthesis using silica reduction technology.