Chemistry - Salt Analysis Question with Solution | TestHub

ChemistrySalt AnalysisTEST OF CATIONS, Group 3, 4, 5, 6, 0Medium2 minQB

ChemistryMediumsingle choice

Passage / Comprehension

Solution (R) produces white precipitate (S) with Na₂CO₃. Part of (P) produces a red color in a Bunsen flame test. Gas (Q) produces a black precipitate with CuSO₄.

Compound $(P)$ is :

Options:

Answer:

Solution:

The red flame test indicates the presence of Calcium ( $C a^{2 +}$ ) in the binary compound (P). Both $C a_{3} P_{2}$ and $C a S$ react with $H Cl$ to form $C a C l_{2}$ (Solution R), which produces a white precipitate of $C a C O_{3}$ when added to $N a_{2} C O_{3}$ . The gases evolved, $P H_{3}$ (from $C a_{3} P_{2}$ ) and $H_{2} S$ (from $C a S$ ), both have irritating odors and react with $C u S O_{4}$ to form black precipitates ( $C u_{3} P_{2}$ and $C u S$ , respectively). Since both compounds satisfy all the given conditions, the correct option is (D) A & B both are possible.

Stream:JEESubject:ChemistryTopic:Salt AnalysisSubtopic:TEST OF CATIONS, Group 3, 4, 5, 6, 0

⏱ 2mℹ️ Source: QB

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