The chemical warfareagent that attacks primarily the airway and the lungs would be a choking agent. It would cause irritation of the whole respiratory system resulting to dry-land drowning. Examples are chlorine gas, phosgene, acrolein and chloropicrin.
The substance is an element off of the periodic table.
A) heating a pan of water until the water is all gone because then it would change from a liquid top a gas.
