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Q.

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

answer is D.

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Detailed Solution

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