NEET 2000 Chemistry question
In quantitative analysis of second group in lab. gas is passed in acidic medium for ppt. When and react with KCN, than in which of the following condition, ppt will not be formed due to relative stability :
Answer: (3)
Solution
In the separation of Group II (copper subgroup: ; and cadmium: ) is first reduced by cyanide to (cyanide is oxidised to cyanogen), and then forms the very stable tetracyanocuprate(I) complex . Cadmium forms
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