If two dangerous chemicals combine will the result be dangerous?

yes it will be dangerous. for example and don't try this. my lessons chemistry teacher was telling us what will happen if you take potassium and throw it in water. the reaction is dangerous. also too, if you heat common table salt, until it is molten. then run a current through it, you'll get sodium metal forming and chlorine gas. the chlorine gas will kill you, so don't try it. but just to show you the dangerous effect of chemicals. this is not totally correct. Sodium is dangerous, as is chlorine, but combined they make common salt.