Given below are two statements : Statement I : The identification of Ni^2+ is carried out by dimethyl glyoxime in the presence of NH_4OH . Statement II : The dimethyl glyoxime is a bidentate neutral ligand. In the light of the above statements, choose the correct answer from the options given below :

Both Statement I and Statement II are true.

Statement I is false but Statement II is true.

Statement I is true but Statement II is false.

Both Statement I and Statement II are false.

Salt Analysis PYQ — JEE Main 2021 · 25 Feb · Shift 2 · Q9 with Solution

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Correct answer: D

Analyze Statement I

Statement I says: identification of $Ni^{2+}$ is carried out by dimethyl glyoxime in the presence of $NH_4OH$ .

In qualitative inorganic analysis, $Ni^{2+}$ is confirmed by adding dimethyl glyoxime (DMG) in ammoniacal medium.

The reaction gives a characteristic bright red precipitate of nickel dimethyl glyoximate:

$Ni^{2+} + 2\,DMG \xrightarrow[NH_4OH]{} Ni(DMG)_2 \downarrow$

Hence, Statement I is true.
Analyze Statement II

Statement II says: dimethyl glyoxime is a bidentate neutral ligand.

Dimethyl glyoxime coordinates to the metal through two nitrogen donor atoms, so it acts as a bidentate ligand.

In the usual description used in coordination chemistry for this test, DMG is treated as a neutral bidentate ligand.

Therefore, Statement II is true.
Choose the correct option

Since both statements are true, the correct option is:

$\boxed{D}$
Comparison with stored answer

Stored correct answer: $D$

My derived answer: $D$

So, the answer agrees with the stored correct answer.