JEE Main202224 Jun 2022Morning ShiftChemistryPractical ChemistryActual
During the qualitative analysis of salt with cation y 2 + , addition of a reagent X to alkaline solution of the salt gives a bright red precipitate. The reagent X and the cation y 2 + present respectively are :
Options
- ADimethylglyoxime and Ni 2 +
- BDimethylglyoxime and Co 2 +
- CNessler's reagent and Hg 2 +
- DNessler's reagent and Ni 2 +
Correct answer
A. Dimethylglyoxime and Ni 2 +
Step-by-step solution
During the qualitative analysis of salt with cation Ni 2 + , addition of a reagent Dimethylglyoxime to alkaline solution of the salt gives a bright red precipitate according to the following reaction. So, The reagent X and the cation y 2 + respectively are Dimethylglyoxime and Ni 2 + Ni 2 + + dmg → Ammonical   Solution Ni dmg 2 Red   colur ↓ ,