InterviewSolution
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InterviewSolution
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Which of the following sulphides is soluble in water?A. `As_(2)S_(3)`B. `Sb_(2)S_(3)`C. `CuFeS_(2)`D. `Al_(2)S_(3)` |
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Answer» Correct Answer - 4 Only Group `1` and `2` metals and aluminimum from soluble sulphides. These readily hydrolyze in water, and as a result ,solution of sulphides are very basic: `S^(2-)(aq.)+H_(2)O(l) hArr HS^(-) (aq.)+OH^(-)(aq.)` These is enough hydrolysis of the hydrogen sulphide ,in turn , to give the solution a strong odour of hydrogen sulphide: `HS^(-)(aq.)+H_(2)O(l) hArr H_(2)S(g)+OH^(-) (aq.)` All other metal sulphides are very insoluble. |
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