Chemistry - Salt Analysis Question with Solution | TestHub
ChemistrySalt AnalysisTEST OF CATIONS, Group 3, 4, 5, 6, 0Medium2 minQB
ChemistryMediummultiple choice
Prussian blue coloration
"R" can be :-
Options:(select one or more)
Answer:
A, B
Solution:
Reaction explanation: The reaction of FeCl₃ (Fe³⁺) with K₃[Fe(CN)₆] (Fe³⁺ complex) initially forms a brown/green solution, not Prussian blue.
Role of "R": To produce the characteristic Prussian blue coloration, either Fe³⁺ needs to be reduced to Fe²⁺, or the ferricyanide complex needs to be reduced to ferrocyanide.
Identifying the reagents: Therefore, must be a reducing agent.
Conclusion: Both SnCl₂ and H₂O₂ + KOH (hydrogen peroxide in an alkaline medium) act as reducing agents, making them the correct choices.
Stream:JEESubject:ChemistryTopic:Salt AnalysisSubtopic:TEST OF CATIONS, Group 3, 4, 5, 6, 0
⏱ 2mℹ️ Source: QB
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