Verified Solution • 2025–26 Session
moderate
QJEEM21Che33b: JEE Main 2021 Chemistry - Class 12 JEEM21Che33b Solution: Given below are two statements : Statement I : The…
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 :
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 :
Multiple Choice Options
- A Statement I is false but Statement II is true.
- B Statement I is true but Statement II is false.
- C Both Statement I and Statement II are false.
- D Both Statement I and Statement II are true.
Step-by-Step Verified Solution
Statement I is true. Dimethyl glyoxime (DMG) is a chelating reagent commonly used for the identification of Ni2+ ions in aqueous solution. In the presence of ammonium hydroxide (NH4OH), Ni2+ reacts with dimethyl glyoxime to form a deep red-colored complex, which can be used to confirm the presence of Ni2+ ions.
Statement II is also true. Dimethyl glyoxime is a neutral bidentate ligand, which means it has two donor atoms that can coordinate with a metal ion, and its overall charge is neutral.
