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Chemistry - Salt Analysis Question with Solution | TestHub

ChemistrySalt AnalysisCATION miscellaneous/mixedMedium2 minPYQ_2020
ChemistryMediumsingle choice

A colorless aqueous solution contains nitrates of two metals,XandY. When it was added to an aqueous solution ofNaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residuePand a solutionQ. The residuePwas soluble in aq.NH3and also in excess sodium thiosulfate. The hot solutionQgave a yellow precipitate withKI. The metalsXandY, respectively, are

Options:

Answer:
A
Solution:

X=AgNO3,  Y=PbNO32

AgNO3X+NaClAgCl(P) +NaNO3

AgCl(s)(P)+2NH3AgNH32+SolubleCl

AgCl(P)+2Na2S2O3Na3AgS2O32Solubel+NaCl

PbNO32Y+2NaClPbCl2WhitepptQ(Solubleinhotwater)  ↓+2NaNO3 

PbCl2aq.Q+2KIPbI2Yellowppt+2KCl

Stream:JEE_ADVSubject:ChemistryTopic:Salt AnalysisSubtopic:CATION miscellaneous/mixed
2mℹ️ Source: PYQ_2020

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