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CHEMISTRY:COLOURS OF COMPOUNDS

Colours of some common salts / compounds
Salts/Compounds                                                                       Colour
Potassium dichromate, K2Cr2OT                                                                          Orange
Potassium permanganate, KMnO4                                              Violet
Friferric tetraoxide
: Fe3O4                                                                                           Black
Ferrous sulphate, FeSO
4.7H2O                                                   Green
Ferric sulphate, Fe(SO
4)3                                                                                          Yellow
Ferric hydroxide, Fe(OH)2                                                          
Green
Ferrous hydroxide, Fe(OH)3                                                        Orange or reddish brown
Ferrous chloride, FeCL                                                                Yellow
Ferric chloride. FeCI3                                                                   Reddish brown
Iron (II) carbonate, FeCO.                                                           Brown
Iron (III) nitrate, Fe(NO
3)3                                                                                          Red
Iron (II) sulphide, FeS                                                                  Black
Iron (III) sulphide,. Fe
2S3                                                                                            Black
Copper carbonate, CuCO.                                                           Green
Copper nitrate, Cu(NO
3)2                                                                                           Bluish green
Copper sulphate, CuSO4.5H,,O                                                   Blue
Anhydrous copper sulphate, CuSO4                                            White
Copper sulphide, CuS                                                                 Black
Copper chloride, CuCI2                                                               Yellow
Copper (II) oxide, CuO                                                                Black
Copper (1) oxide, Cu2O                                                               Red