In basic medium, the amount of Ni^{2+} in a s | vedclass

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(A, B, C) The reaction of $Ni^{2+}$ with dimethylglyoxime $(DMG)$ in an ammoniacal (basic) medium produces a cherry-red precipitate of nickel$(II)$ di

Vedclass · Accepted Answer

Each dimethylglyoximate unit forms a five-membered chelate ring with $Ni^{2+}$.

Vedclass · Answer

(A, B, C) The reaction of $Ni^{2+}$ with dimethylglyoxime $(DMG)$ in an ammoniacal (basic) medium produces a cherry-red precipitate of nickel$(II)$ dimethylglyoximate, $[Ni(DMG)_2]$.In this complex, two dimethylglyoximate units are bound to one $Ni^{2+}$ ion.The two dimethylglyoximate units are held together by strong intramolecular hydrogen bonding.Each dimethylglyoximate unit forms a five-membered chelate ring with the $Ni^{2+}$ ion through the nitrogen atoms of the oxime groups.Therefore, statements $A$, $B$, and $C$ are correct, while $D$ is incorrect because the chelate ring formed is five-membered, not six-membered.

List-$I$	List-$II$
$(A). [Ag(CN)_2]^-$	$1. \text{Square planar, } 1.73 \, B.M.$
$(B). [Cu(CN)_4]^{3-}$	$2. \text{Linear, } 0 \, B.M.$
$(C). [Cu(CN)_6]^{4-}$	$3. \text{Octahedral, } 0 \, B.M.$
$(D). [Cu(NH_3)_4]^{2+}$	$4. \text{Tetrahedral, } 0 \, B.M.$
$(E). [Fe(CN)_6]^{4-}$	$5. \text{Octahedral, } 1.73 \, B.M.$

In basic medium, the amount of $Ni^{2+}$ in a solution can be estimated with the dimethylglyoxime reagent. The correct statement$(s)$ about the reaction and the product is (are):

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