Upon treatment with ammoniacal H_2S , the metal ion that precipitates as a sulfide is

JEE Advanced 2013 Chemistry question

Upon treatment with ammoniacal , the metal ion that precipitates as a sulfide is

(A)Fe(III)
(B)Al(III)
(C)Mg(II)
(D)Zn(II)Correct

Answer: (D)

Solution

In ammoniacal medium is high enough to precipitate the group IV sulphides (ZnS, MnS, NiS, CoS). gives a white precipitate of ZnS: option (D). is precipitated as , not as a

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Question ID VK-026149