from the following list of substances choose the substances which meet the description given in parts (1)to(5) below:
ammonium chloride, ammonium nitrate, chlorine, dilute hcl, iron, lead nitrate, manganese(v) oxide, silver nitrate, sodium nitrate, sodium nitrite, sulphur
1.two compounds heated together in solution to produce nitrogen
2.acompound which on heating produce nitrogen as the only gaseous product
3.a substance containing both molecules and ions
4.two compounds whose aqueous solution give white precipitate
5.an element which exists in 2 crystalline forms
