Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is: vEyh; Qsfjd DyksjkbM foy;u dh iksVSf'k;e QsjkslkbukbM ds vkf

Question

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is: vEyh; Qsfjd DyksjkbM foy;u dh iksVSf'k;e QsjkslkbukbM ds vkf/kD; esa vfHkfØ;k djus ij ,d izwf'k;u Cyw jax dh dksykbMh Lih'kht izkIr gksrh gS] og gS%

(A) K5Fe[Fe(CN)6]2
(B) HFe[Fe(CN)6]
(C) Fe4[Fe(CN)6]3
(D) KFe[Fe(CN)6]

Prashant Kotian · Accepted Answer

Correct answer: D. FeCl3 + K4[Fe(CN)6]  KFe[Fe(CN)6] + 3KCl FeCl3 is limiting reagent. So not all potassium is displaced.

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