Chemistry - Salt Analysis Question with Solution | TestHub

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

ChemistryMediummultiple choice

A mixture of Group II sulfides ( $CuS, HgS, Bi_{2} S_{3}, CdS$ ) is treated with $50% HNO_{3}$ while heating. Which of the following observations is/are expected?

Options:(select one or more)

Answer:

A, B, C

Solution:

Concept: Solubility of sulfides in oxidizing acids.

Solution: HgS is only soluble in Aqua Regia. CuS, Bi₂S₃, and CdS dissolve in HNO₃ via oxidation of S²⁻ to S.

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

⏱ 2mℹ️ Source: QB

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