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K4 [Fe(CN)] can be used to detect one or more out of Fe2+, Fe3+, Zn2+, Cu2+, Cd2+, Ca2+

(A) Fe2+, Fe3+ only 

(B) Fe3+, Zn2+, Cu2+ only 

(C) All but Ca2+ 

(D) All 

1 Answer

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Best answer

(D) A, B, C

(A) Fe2+, Fe3+ only

(B) Fe3+, Zn2+, Cu2+ only

(C)  All but Ca2+

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