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In the group II of qualitative analysis...

In the group II of qualitative analysis, It is necessary to pass `H_2S ` in …………. Medium , otherwise the sulphides of the cations of group ……… will also get precipitated.

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To solve the question, we need to understand the context of qualitative analysis in chemistry, specifically regarding the precipitation of sulfides when passing hydrogen sulfide (H₂S) gas. ### Step-by-Step Solution: 1. **Understanding the Groups in Qualitative Analysis**: - In qualitative analysis, cations are divided into different groups based on their solubility and the reagents used for their identification. Group II cations typically include those that form insoluble sulfides when H₂S is introduced. 2. **Identifying the Medium**: ...
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