Q.

For the salt solution, Nessler’s reagent  (K2HgI4) Is added, a reddish brown(brick red) colour precipitate of Iodide of Million’s base is formed. The cation present in the salt is ?  

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a

NH4+

b

Pb+2

c

Mg+2

d

Mn+2

answer is A.

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Detailed Solution

NH4+(salt)+Nessler's  reagent     
H2N.HgO.HgI
(Iodide of millons base)

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