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(i) Ni^(2+) is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction. Cu^(+), Zn^(2+), Sc^(3+), Ti^(4+) are colourless. Prove this statement. |
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Answer» Solution :(i) `Ni^(2+)` ions present in Nickel chloride solution is estimated accurately for forminng an INSOLUBLE COMPLEX called `[Ni(DMG)_(2)]` Nickel ion reacts with alcoholic solution of DMG in the presence of ammonical MEDIUM, to give ROSY red precipitate of `[Ni(DMG)_(2)]` complex.  (ii) 1. `Cu^(+), Zn^(2+)"have d"^(10)` configuration and `Sc^(3+), Ti^(4+) "have d"^(1)` configuration. 2. d-d transitionn is not POSSIBLE in the above complexes. So they are colourless. |
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