1.) 6HNCO -----> C3N3(NH2)3 + 3CO2. 2.) Decomposition reaction bcoz 1 reactant forms more than 1 product. 3.) Single replacement reaction bcoz B is replaced by C. 4.) Combination reaction bcoz A and B combines to form 1 product. 5.) Double replacement reaction bcoz C is replace by B and B is replaced by C.