Professor Rangappa has string of awards such as Prof. R. C. Shah Memorial National Award, Dr. M. A. M. Ramaswamy Award, Golden Jubilee C.V. Raman award from University of Mysore, Sir C.V. Raman Young Scientist Award (2006) from Karnataka State Council for Science and Technology, Professor H. Sankegowda National Research Award and Chemical Research Society of India (CRSI) Bronze Medal (2006) in Chemical Sciences by Chemical Research Society of India. Prof. Y. T. Thathachari prestigious research award for science ¡V 2007, Prestigious Dr. Raja Ramanna State Award, from Karnataka State Council for Science and Technology 2011, Amity Academic Excellence award 2012, Global e-learning award 2012.