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| 1. |
CuSO_(4).5H_(2)O is blue in colour while CuSO_(4) is colourless. Why ? |
| Answer» Solution :In `CuSO_(4).5 H_(2)O, 4 H_(2)O` molecules are present as ligand. CRYSTAL FIELD splitting occurs and hence d-d transition occurs which gives it BLUE colour. In `CuSO_(4)`, there are no `H_(2)O` molecules present as ligand. No crystal field splitting occurs and hence it has no colour. | |