| Compounds | Uses |
|---|---|
| Ferrous oxide (FeO) | In green glass, Ferrous salt |
| Ferric oxide (Fe3O4) | In electroplating of ornaments and formation of ferric slat |
| Ferrous sulphate (FeSO4 . 7H2O) | In dye industry, and Mohr's salt |
| Ferric hvdroxide [(Fe(OH)3)] | In laboratory reagent and in making medicines. |
| Iodine (I2) | As antiseptic and In making tincture of iodine. |
| Bromine (Br2) | In dye industry and As laboratory reagent |
| Chlorine (Cl2) | In the formation of Mustard gas and Bleaching powder |
| Hydrochloric acid (HC1) | In the formation of aquaregia (3 HC1 : 1 HNO3) and dyes |
| Sulphuric acid (H2SO4) | As a reagent, In purification of petroleum & In lead storage battery. |
| Sulphur dioxide (SO2) | As oxidants & reductants & As bleaching agent |
| Hydrogen Sulphides (H2S) | In qualitative analysis of basic radical . (group separation) |
| Sulphur (S) | Antiseptics, vulcanization of rubber, gun powder, medicine. |
| Ammonia (NH3) | As reagent in ice factory. |
| Phosphorous | Red (P4) refrigerant, in match industry etc. White (P4) - Rat killing Medicine. |
| Producer gas (CO + N2) | In heating furnace, Cheap fuel, In Extraction of metal |
| Water gas (CO + H2) | As fuel & Welding work |
| Coal gas | As fuel & Inert atmosphere |
| Nitrous oxide (N2O) | Laughing gas, Surgery. |
| Carbondioxide (CO2) | Sodawater, Fire extinguisher. |
| Carbon monoxide (CO) | In phosgene gas (COCl2). |
| Graphite | As electrodes. |
| Diamond | Ornaments, Glass cutting, Rock drilling. |
| Alum [K2SO4 Al2 (SO4)3 . 24 H2O] | Purification of water & Leather industry. |
| Aluminium sulphate [A12(SO4)3 . 18H2O] | In paper industry/fire extinguisher. |
| Anhydrous aluminium chloride (A1C13) | Cracking of petroleum. |
| Mercuric Chloride (HgCl2) | Calomel, Insecticides (Corrosive sublimate) |
| Mercuric oxide (HgO) | Oientment, poison. |
| Mercury (Hg) | Thermometer vermillion, amalgum. |
| Compounds | Uses |
|---|---|
| Zinc Sulphide (ZnS) | White pigment. |
| Zinc Sulphate (White vitriol) (ZnSO4 . 7H2O) | Lithopone, Eye ointment. |
| Zinc Chloride (ZnCl2) | Textile industry. |
| Zinc oxide (ZnO) | Ointment. |
| Zinc (Zn) | In battery. |
| Calcium carbide (CaC2) | Calcium cyanide & acetylene gas. |
| Bleaching powder [Ca(OCl) Cl] | Insecticides, Bleaching actions. |
| Plaster of paris [(CaSO4)2 . 2H2O/CaSO4 .1/2 H2O)] | Statue, Surgery. |
| Calcium sulphate (CaSO4 . 2H2O) | Cement industry. |
| Calcium carbonate (CaCO3) | Lime & toothpaste. |
| Copper sulphate (CuSO4 . 5H2O) | Insecticides, Electric cells. |
| Cupric oxide (CuO) | Blue & green glass, purification of petroleum |
| Cuprous Oxide (Cu2O) | Red glass, pesticides. |
| Copper (Cu) | Electrical wire. |
| Sodium nitrate (NaNO3) | Fertilizer. |
| Sodium Sulphate (Glauber salt) (Na2SO4 . 10H2O) | Medicine, cheap glass |
| Sodium bicarbonate (Baking soda) (NaHCO3) | Fire extinguisher, bakery, reagent. |
| Sodium Carbonate (Washing soda) | Glass industry, Paper industry, Removal of permanent hardness of water, washing |
| Hydrogen peroxide (H2O2) | Oxidants & reductants, Insecticides. |
| Heavy water (D2O) | Nuclear reactor. |
| Liquid Hydrogen | Rocket fuel. |