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Grade: 12th pass
        
A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate.  The metal ion is
a. Pb^2+
b. Hg^2+
c. Cu^2+
d. Co^2+
3 years ago

Answers : (1)

bharat bajaj
IIT Delhi
askIITians Faculty
123 Points
							Hg (2+) + KI = HgI2 ( Red ppt.)
HgI2 + KI (excess) = K2HgI4

HgI^(2+) + Co(SCN)2 = Hg(SCN)2 Blue crystalline precipitate
B) is the answer
THanks
Bharat Bajaj
askiitians faculty
3 years ago
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