Chemistry - Salt Analysis Question with Solution | TestHub

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

ChemistryMediummultiple choice

Which of the following ppt of Hg is/are black in colour :-

Answer:

A, D

Solution:

HgS (mercuric sulfide) → black ppt

Hg₂CrO₄ (mercurous chromate) → generally red/brown, not black

Hg₂I₂ (mercurous iodide) → green/yellow ppt

Hg₂O (mercurous oxide) → black ppt (due to formation of Hg metal + HgO)

So, black precipitates of Hg are:

HgS and Hg₂O

Correct answer: (A) and (D)

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

⏱ 2mℹ️ Source: QB

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