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Fe2+ does not give Prussian blue colour with K4 [Fe(CN)6 ] but on its reaction with (X), Prussian blue colour appears (X) can be : 

(A) MnO4/ H

(B) H2SO

(C) NH3 

(D) All true

1 Answer

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by (63.9k points)
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Best answer

(A) MnO4 / H+

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