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InterviewSolution
| 1. |
Coordination compounds plays many important roles in animals and plants. The are essential in the storage and transport of oxygen as electrons transfer agents as catalysts and in photosynthesis Wide range of application in daily life takes place through formation of complexes Photographic fixing qualitative and quantitative analysis purification of water metallurgical extraction are some specific worth mentioning`Cu^(2+)` and `Cd^(2+)` both are precipitated as sulphides on passing `H_(2)S` gas in dil `HCI` medium However, precipitation of `Cu^(2+)` is prevented by (a) Adding excess of `K_(4)[Fe(CN)_(6)]` when `Cd^(2+)` is only precipitated (b) Adding excess of `KNC` when `Cu^(2+)` for stable complex `[Cu(CN)_(4)]^(3-)` and `Cd^(2+)` forms unstable complex `[Cd(CN)_(4)]^(2-)` (c ) All of the above |
| Answer» Correct Answer - B | |