When a black metal sulphide reacts with dil. HCl, a gas liberates, which of the following pair of ca — Qualitative and Quantitative Analysis Chemistry Question
Question
When a black metal sulphide reacts with dil. HCl, a gas liberates, which of the following pair of cation can be separated by the liberated gas ?
Answer: A
💡 Solution & Explanation
Both Zn2+ and Cd2+ cations can be separated by passing H2S gas in acidic as well as in neutral medium. (i) Zn2+ + H2S -> No ppt. (ii) Cd2+ + H2S -> CdS↓ (Yellow ppt.)
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