| 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. |