Your chances of being accepted into a government engineering college in Kerala are minimal if you have a normalized KEAM score of 81 out of 300 and a 75 percentile for high-demand fields like computer science, electrical engineering, or ECE because these colleges often have considerably higher closing ranks (often under 5,000).  However, based on your final KEAM rank and category, you could have a chance in less desirable fields or at self-financing colleges.  During the counseling process, verify your real rank and compare it with the cutoffs from prior years for various institutions and branches, as admission is solely determined by the rank list that is released following the results.