The potassium ferrocyanide solution gives a Prussion blue colour, when added to : (A) CoCl3 (B) FeCl — JEE Mains Chemistry Past Papers Chemistry Question
Question
The potassium ferrocyanide solution gives a Prussion blue colour, when added to : (A) CoCl3 (B) FeCl2 (C) FeCl3 (D) CoCl2 IkksVSf'k;e Qsjkslk;ukbM foy;u ,d izwf'k;u Cyw jax nsrk gS tc bls feyk;k tkrk gS % (1) CoCl3 esa (2) FeCl2 esa (3) FeCl3 esa (4) CoCl2 esa
Answer: C
💡 Solution & Explanation
6NaCN + FeSO4 Na4[Fe(CN)6] Na4[Fe(CN)6] + 4Fe3+ xH O Fe4[Fe(CN)6]3. xH2O Ferric ferrocyanide (Prussian blue complex)
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