Chemistry - Salt Analysis Question with Solution | TestHub

ChemistrySalt AnalysisTEST OF CATIONS Dry Test, Group Analysis, Group 1,2Medium2 minQB

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Which of the following sulphides will dissolve in KCN solution ?

Answer:

Solution:

In salt analysis, sulfides dissolve in KCN solution by forming soluble cyanide complexes.

CuS dissolves in KCN due to the formation of the stable complex ion $[C u (CN)_{4}]^{3 -}$ .

CdS and MnS do not dissolve easily in KCN, while HgS is highly insoluble.

Therefore, the sulfide soluble in KCN solution is CuS.

Stream:JEESubject:ChemistryTopic:Salt AnalysisSubtopic:TEST OF CATIONS Dry Test, Group Analysis, Group 1,2

⏱ 2mℹ️ Source: QB

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