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Ammonia forms the complex `[Cu(NH_3)_4]^(2+)` with copper ions in alkaline solution but not in acid solution. The reasons for it is:A. In alkaline solution insoluble `Cu(OH)_(2)` is precipitated which is soluble in excess of any alkaliB. `Cu(OH)_(2)` is amphotericC. In acidic solution hydration protects `Cu^(2+)` ionD. In acid solution proton coordinates with `NH_(3)` forming `NH_(4)^(+)` ion and `NH_(3)` is not available |
| Answer» Correct Answer - D | |