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Which of the following reagent can be used to distinguish Cu2+; Cd2+ and Bi3+

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a
Dilute HCl
b
H2S gas in the presence of HCl
c
NH4OH+NH42SO4
d
K4FeCN6

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detailed solution

Correct option is D

K4FeCN6→Cu2+Cu2FeCN6Chocolate BrownK4FeCN6+Cd2+→Cd2FeCN6+4K+1Greenish whiteK4FeCN6+Bi3+→ No reaction

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