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    				| 1. | 
                                    Identify the substance R based on the information given below: The pale green solid R turns reddish brown on heating. Its aqueous solution gives a white precipitate with barium chloride solution. The precipitate is insoluble in mineral acids. | 
                            
| Answer» Solution :R = IRON (II) sulphate `(FeSO_(4)*7H_(2)O)` | |