9: A lightning flash in the air occurs in the formation of a)ammonia b)carbon dioxide c)nitric oxide d)water 10: A fertilizer that may explode is a)ammonium nitrate b)ammonium sulfate c)potassium chloride d)urea 11: The ratio of the volumes of nitrogen and ammonia in the equation N2+3H2 ---> 2NH3 a)1:2 b)2:2 c)1:3 d)2:8 12: Ammonia is a compound while ammonium is a)a base b)a radical c)an atom d)an element 13: Nitrogen dioxide is produced by reacting a)Copper and HCl b)Nitric Acid and concentrated Br c)Copper and concentrated Nitric Acid d)Concentrated Copper and metallic Cu 16: To test for an ammonium salt heat it with a)Calcium b)NH4OH c)O2 d)FeSO4 & H2SO4 17: The catalyst used in the Haber Process is a)iron oxide b)platinum c)manganese dioxide d)vanadium pentoxide 18: The presence of water vapor in the air may be demonstrated by the use of a)phosphorus b)limewater c)sodium hydroxide d)magnesium