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Given below are two statements : Statement I : The identification of Ni2+ is carried out by dimethyl glyoxime in the presence of NH4OH. 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:

1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are false.
3. Statement I is true but Statement II is false.
4. Both Statement I and Statement II are true.

Correct answer: Statement I is true but Statement II is false.

Solution

Statement I is correct because dimethyl glyoxime is indeed used to identify Ni2+ ions in the presence of ammonium hydroxide, forming a characteristic red complex. However, Statement II is false because dimethyl glyoxime acts as a bidentate ligand, but it is not neutral; it carries a charge when it coordinates with metal ions.

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