NEET2026ChemistryChapterActual
Match List I (Reagent/Test) with List II (Ion identified) based on the characteristic precipitates or colors formed in qualitative analysis: List I List II A Dimethylglyoxime I Pb²⁺ B Potassium chromate II Cu²⁺ C Sodium nitroprusside III Ni²⁺ D Potassium ferrocyanide IV S²⁻ Choose the correct answer from the options given below:
Options
- AA-III, B-II, C-IV, D-I
- BA-IV, B-I, C-III, D-II
- CA-III, B-I, C-IV, D-II
- DA-II, B-I, C-IV, D-III
Correct answer
C. A-III, B-I, C-IV, D-II
Step-by-step solution
Dimethylglyoxime reacts with Ni²⁺ in an ammoniacal medium to form a rosy red precipitate of Ni(DMG)₂ . This corresponds to test tube A. Thus, A III. Potassium chromate reacts with Pb²⁺ to form a yellow precipitate of lead chromate, PbCrO₄ . This corresponds to test tube B. Thus, B I. Sodium nitroprusside reacts with sulfide ions ( S²⁻ ) to form a purple-violet complex, [Fe(CN)₅NOS]⁴⁻ . This corresponds to test tube C. Thus, C IV. Potassium ferrocyanide reacts with Cu²⁺ to form a chocolate brown precipitate of coppe